Add state/framework/etc. conditional compile flags

This adds conditional compilation for the following features, in
addition to the voice conditional compilation flag:

- extras (message builder)
- framework
- methods
- state

These 4 are enabled _by default_, while the `voice` feature flag is
disabled.

Disabling the state will allow incredibly low-memory bots.

2 files changed, 10 insertions, 5 deletions

diff --git a/src/ext/mod.rs b/src/ext/mod.rs
index bb87911..312074b 100644
--- a/src/ext/mod.rs
+++ b/src/ext/mod.rs
@@ -5,10 +5,17 @@
 //!
 //! See each extension's module-level documentation for more information.
 //!
+//! Note that the framework module requires the `framework` feature to be
+//! enabled (enabled by default), the state requires the `state` feature to be
+//! enabled (enabled by default), and voice support requires the `voice` feature
+//! to be enabled (disabled by default).
+//!
 //! [`Client`]: ../client/struct.Client.html
 //! [`Connection`]: ../client/struct.Connection.html
 
+#[cfg(feature = "framework")]
 pub mod framework;
+#[cfg(feature = "state")]
 pub mod state;
-#[cfg(feature="voice")]
+#[cfg(feature = "voice")]
 pub mod voice;
diff --git a/src/ext/state/mod.rs b/src/ext/state/mod.rs
index fa38b6f..5c56a54 100644
--- a/src/ext/state/mod.rs
+++ b/src/ext/state/mod.rs
@@ -166,7 +166,7 @@ impl State {
                 self.update_with_guild_member_remove(event);
             },
             Event::GuildMemberUpdate(ref event) => {
-                self.update_with_guild_member_update(event, false);
+                self.update_with_guild_member_update(event);
             },
             Event::GuildMembersChunk(ref event) => {
                 self.update_with_guild_members_chunk(event);
@@ -448,10 +448,8 @@ impl State {
     }
 
     pub fn update_with_guild_member_update(&mut self,
-                                           event: &GuildMemberUpdateEvent,
-                                           old: bool)
+                                           event: &GuildMemberUpdateEvent)
                                            -> Option<Member> {
-
         if let Some(guild) = self.guilds.get_mut(&event.guild_id) {
             let mut found = false;