v0.1.4: OOP and a general update

This is a general release for pretty much everything, from new features to
bugfixes to a switch to a more OOP style. The current minimum supported version
is rustc 1.13+.

The next release will be v0.2.0, which will feature serde codegen support along
with a rewrite of the framework. It will be a more modularized version of the
library. v0.2.0 will require rustc 1.15+, due to the stabilization of Macros
1.1.

Thanks to the following for contributions this release:

- [@acdenisSK]
- [@bippum]
- [@DeltaEvo]
- [@emoticon]
- [@foxbot]
- [@fwrs]
- [@hsiW]
- [@indiv0]
- [@SunDwarf]

Two of the major highlights of this release are that the broken pipe issue has
been fixed, and the library is more OOP now and therefore no longer relies on
the `Context` to get stuff done. The `methods` feature flag has been removed.

Added

- the `voice` feature no longer requires the `cache` feature to be enabled
  [c:7b45f16]
- the `framework` feature no longer requires the `cache` feature to be enabled
  [c:86cd00f]
- `Guild`, `InviteGuild`, and `PartialGuild` now have `splash_url` methods
  [c:d58c544]
- Expose `Message::webhook_id` for messages sent via webhooks ([@fwrs])
  [c:a2cbeb6]
- Framework: add option to ignore webhooks or DMs ([@fwrs]) [c:8e2c052]
- Added documentation for creating embed timestamps ([@foxbot]) [c:66546d3]
- Allow `time::Tm` to be passed into the embed timestamp field, in addition to
  a direct string [c:b001234]
- Add `Client::on_message()` example ([@indiv0]) [c:bcb70e8]
- Support webp/gif avatars/icons in URL methods [c:ab778f8]
- Update current user presence in cache on set [c:5b275fc]
- Add `CurrentUser`/`User::static_avatar_url()` methods to generate webp URLs
  [c:c36841d]
- Command (batch) alias support ([@fwrs]) [c:f96b6cc]
- Command example field for help command ([@fwrs]) [c:f96b6cc]
- Added "Meibi Pink" to the `Colour` struct ([@hsiW]) [c:2cb607d]
- Register support for `4011` code (too many shards) ([@SunDwarf]) [c:93f3c60]
- Added "Rohrkatze Blue" to the `Colour` struct ([@bippum]) [c:345e140]
- Add `User::default_avatar_url()` [c:e85e901]
- Add `Message::content_safe()` to avoid `@everyone`/`@here`s ([@fwrs])
  [c:e5a83dd]
- Add `Member::distinct()`, `User::distinct()` ([@fwrs]) [c:e5a83dd]
- Document that messages can't be older than 14 days when bulk deleting
  ([@fwrs]) [c:0a2f5ab]
- Add shard latency tracking (~~stolen~~ borrowed from brayzure/Eris)
  [c:096b0f5]
- Add guild chunking [c:3ca7ad9]

Fixes

- `User::avatar_url` no longer mentions the user in the generated URL
  [c:0708ccf]
- Framework: `owners_only` check now functions only if the author of a message
  is an owner ([@fwrs]) [c:6355288]
- Framework: fix command cooldown timer (would always say to wait `i64::MAX`
  seconds) [c:fafa363]
- Framework: the `before` closure is now properly run when a message is sent by
  the owner [c:760a47a]
- `CurrentApplicationInfo` now properly decodes due to `flags` no longer being
  sent [c:2a743ce]
- Fix `Message::delete()` permission check [c:4229034]
- Framework: properly split messages on character boundary limits; aka thanks
  Unicode [c:c01f238]
- Remove need to import Context/Message in command macros ([@acdenisSK])
  [c:abd22d2]
- Fix a ton of gateway stuff [c:94fc85b], [c:f894cfd], [c:f894cfd]
- Specify `command!` macro signature as returning `std::result::Result`
  [c:e9aae9c]
- Fix dependency description in example 06 ([@DeltaEvo]) [c:92309b2]
- Return a `User` from `rest::get_user` -- not a `CurrentUser` [c:f57a187]
- Fix shards always booting at index 0 [c:83b29d5]
- Wait 5 seconds between shard boots to avoid session invalidations [c:fb4d411]
- Use CDN for default avatars [c:69ec62a]
- Fix `Resumed` event payload decoding [c:c2e8b69]
- Fix `CurrentApplicationInfo` decoding without `rpc_origins` [c:38db32e]
- Reboot shard on broken pipe; fixes a lot of gateway problems [c:76f9095]
- Make `rest::execute_webhook` be a POST [c:c050c59]

Changed

- Framework: argument number is now displayed on parsing error ([@fwrs])
  [c:fb07751]
- Id display formatters use the direct u64 instead of mentioning;
  `format!("{}", UserId(7))` will format into `"7"` instead of `"<@7>"`
  [c:933ee89]
- Default the framework's `use_quotes` for quote parsing to `false` (was `true`)
  [c:38a484d]
- The `CreateEmbed` builder now has direct `image` and `thumbnail` methods
  instead of one-method builders [c:68c473d]
- Accept `u64` shard counts to allow using more than 255 shards (instead of
  `u8`s) [c:ada07fa]
- Remove user logout endpoint [c:70bf22a]
- Don't abuse unicode for message content sanitization ([@fwrs]) [c:2b237e7]
- Change `Colour` struct to be a tuplestruct [c:a8acd61]
- Make a single POST on guild role create [c:147cf01]
- Switch to a mostly-fully OOP approach [c:651c618]
- Rename `webhooks` methods to `get_webhooks`
  (eg: `GuildChannel::webhooks()` --> `GuildChannel::get_webhooks()`)
  [c:e8a9086]
- Make `Guild::create_channel` and related functions return a `GuildChannel`
  [c:5918d01]

Misc.

- Cleaned up YAML definition layouts [c:00fb61b]
- Gateway identify compression code is now simplified [c:2416813]
- Gateway Event decoders are now abstracted to individual struct implementations
  [c:5fe6a39]
- Simplify `Role`'s' `Ord` impl ([@emoticon]) [c:6a887b2]
- Slightly simplify `Shard::set_presence` [c:5c40e85]
- Rename repo references from `serenity.rs` to `serenity` ([@fwrs]) [c:3348178]
- Simplify `Reaction::delete()` [c:1594961]
- Abstract large threshold number to a constant [c:f3f74ce]
- Avoid a needless string clone on login [c:d3389be]
- Avoid a lot of `Arc`/`Message`/`RwLock` clones [c:8c5ee70]

[c:00fb61b]: https://github.com/zeyla/serenity/commit/00fb61b5f306aebde767cc21a498a8ca0742d0be
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[c:345e140]: https://github.com/zeyla/serenity/commit/345e1401142d21a0fdabb2accd1f33e3a07c02c8
[c:38a484d]: https://github.com/zeyla/serenity/commit/38a484d0fec91e290bc1633fc871131f9decd0ca
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[c:6a887b2]: https://github.com/zeyla/serenity/commit/6a887b25f2712d70c65fc85b5cfbd8b6d4b41260
[c:6355288]: https://github.com/zeyla/serenity/commit/635528875c59d34f0d7b2f2b0a3bd61d762f0e9c
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[c:69ec62a]: https://github.com/zeyla/serenity/commit/69ec62a42bcb143cdde056ad8ffce81922e88317
[c:70bf22a]: https://github.com/zeyla/serenity/commit/70bf22a00cd19651a0d994cc43e8d8c4bd8947fc
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[c:f894cfd]: https://github.com/zeyla/serenity/commit/f894cfdc43a708f457273e1afb57ed1c6e8ebc58
[c:f96b6cc]: https://github.com/zeyla/serenity/commit/f96b6cc5e1e0383fd2de826c8ffd95565d5ca4fb
[c:fafa363]: https://github.com/zeyla/serenity/commit/fafa3637e760f0c72ae5793127bc2f70dcf2d0e2
[c:fb07751]: https://github.com/zeyla/serenity/commit/fb07751cfc1efb657cba7005c38ed5ec6b192b4f
[c:fb4d411]: https://github.com/zeyla/serenity/commit/fb4d411054fa44928b4fa052b19de19fce69d7cf<Paste>
[@acdenisSK]: https://github.com/acdenisSK
[@bippum]: https://github.com/bippum
[@DeltaEvo]: https://github.com/DeltaEvo
[@emoticon]: https://github.com/emoticon
[@foxbot]: https://github.com/foxbot
[@fwrs]: https://github.com/fwrs
[@hsiW]: https://github.com/hsiW
[@indiv0]: https://github.com/indiv0
[@SunDwarf]: https://github.com/SunDwarf