More config for CreateCommand, add various methods

Adds multiple configurations to the command builder, and adds methods
to various structs.

Context::get_current_user is a shortcut to retrieve the current user
from the cache.

Message::get_member retrieves the member object of the message, if sent
in a guild. Message::is_private checks if the message was sent in a
Group or PrivateChannel.

User::member retrieves the user's member object in a guild by Id;

Adds 6 configurations to the command builder:

- dm_only: whether the command can only be used in direct messages;
- guild_only: whether the command can only be used in guilds;
- help_available: whether the command should be displayed in the help
  list;
- max_args: specify the maximum number of arguments a command must be
  given;
- min_args: specify the minimum number of arguments a command must be
  given;
- required_permissions: the permissions a member must have to be able
  to use the command;

1 files changed, 1 insertions, 1 deletions

diff --git a/src/model/invite.rs b/src/model/invite.rs
index 804f5ef..4742b39 100644
--- a/src/model/invite.rs
+++ b/src/model/invite.rs
@@ -115,7 +115,7 @@ impl RichInvite {
     /// [`rest::delete_invite`]: ../client/rest/fn.delete_invite.html
     /// [Manage Guild]: permissions/constant.MANAGE_GUILD.html
     /// [permission]: permissions/index.html
-    #[cfg(feature = "methods")]
+    #[cfg(feature="methods")]
     pub fn delete(&self) -> Result<Invite> {
         feature_cache_enabled! {{
             let req = permissions::MANAGE_GUILD;