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, 7 insertions, 7 deletions

diff --git a/src/error.rs b/src/error.rs
index 10f8d36..41bda57 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -7,7 +7,7 @@ use std::fmt::{self, Display, Error as FormatError};
 use websocket::result::WebSocketError;
 use ::client::gateway::GatewayError;
 use ::client::ClientError;
-#[cfg(feature = "voice")]
+#[cfg(feature="voice")]
 use opus::Error as OpusError;
 #[cfg(feature="voice")]
 use ::ext::voice::VoiceError;
@@ -66,12 +66,12 @@ pub enum Error {
     /// An error from the `rust-websocket` crate.
     WebSocket(WebSocketError),
     /// An error from the `opus` crate.
-    #[cfg(feature = "voice")]
+    #[cfg(feature="voice")]
     Opus(OpusError),
     /// Indicating an error within the [voice module].
     ///
     /// [voice module]: ext/voice/index.html
-    #[cfg(feature = "voice")]
+    #[cfg(feature="voice")]
     Voice(VoiceError),
 }
 
@@ -99,7 +99,7 @@ impl From<JsonError> for Error {
     }
 }
 
-#[cfg(feature = "voice")]
+#[cfg(feature="voice")]
 impl From<OpusError> for Error {
     fn from(e: OpusError) -> Error {
         Error::Opus(e)
@@ -119,7 +119,7 @@ impl Display for Error {
             Error::Io(ref inner) => inner.fmt(f),
             Error::Json(ref inner) => inner.fmt(f),
             Error::WebSocket(ref inner) => inner.fmt(f),
-            #[cfg(feature = "voice")]
+            #[cfg(feature="voice")]
             Error::Opus(ref inner) => inner.fmt(f),
             _ => f.write_str(self.description()),
         }
@@ -138,9 +138,9 @@ impl StdError for Error {
             Error::Json(ref inner) => inner.description(),
             Error::Url(ref inner) => inner,
             Error::WebSocket(ref inner) => inner.description(),
-            #[cfg(feature = "voice")]
+            #[cfg(feature="voice")]
             Error::Opus(ref inner) => inner.description(),
-            #[cfg(feature = "voice")]
+            #[cfg(feature="voice")]
             Error::Voice(_) => "Voice error",
         }
     }