Add a prelude for userland

Users can now import all of a prelude via `use serenity::prelude::*;`,
which should provide some helpful stuff. As such, the internal
prelude is now named `serenity::prelude_internal`, and all internal uses
have been adjusted.

1 files changed, 9 insertions, 0 deletions

diff --git a/src/prelude_internal.rs b/src/prelude_internal.rs
new file mode 100644
index 0000000..9b6b993
--- /dev/null
+++ b/src/prelude_internal.rs
@@ -0,0 +1,9 @@
+//! These prelude re-exports are a set of exports that are commonly used from
+//! within the library.
+//!
+//! These are not publicly re-exported to the end user, and must stay as a
+//! private module.
+
+pub use serde_json::Value;
+pub use ::client::ClientError;
+pub use ::error::{Error, Result};