Expose Metadata

Added access to:
* `/users/@me/guilds`
* `/guilds/{guild_id}`
* `/guilds/{guild_id}/members/{member_id}`

BREAKING CHANGE:
* `get_user_info` -> `fetch_user_info` to match naming scheme.

Remove useless note

Remove `reverse` and corresponding documentation

Update documentation to reflect #1988

Rename `get_` HTTP functions to `fetch_`

Breaking Changes:
* `get_message` -> `fetch_message`
* `get_invite` -> `fetch_invite`
* `get_user_profile` -> `fetch_user_profile`
* `get_webhook_info` -> `fetch_webhook`
* `get_ban` -> `fetch_ban`

Fix InviteConverter, update migrating.rst

Rename get_message to fetch_message

discord/http.py

@@ -553,9 +553,24 @@ class HTTPClient:
 
     # Guild management
 
+    def get_guilds(self, limit, before=None, after=None):
+        params = {
+            'limit': limit
+        }
+
+        if before:
+            params['before'] = before
+        if after:
+            params['after'] = after
+
+        return self.request(Route('GET', '/users/@me/guilds'), params=params)
+
     def leave_guild(self, guild_id):
         return self.request(Route('DELETE', '/users/@me/guilds/{guild_id}', guild_id=guild_id))
 
+    def get_guild(self, guild_id):
+        return self.request(Route('GET', '/guilds/{guild_id}', guild_id=guild_id))
+
     def delete_guild(self, guild_id):
         return self.request(Route('DELETE', '/guilds/{guild_id}', guild_id=guild_id))
 
@@ -593,6 +608,9 @@ class HTTPClient:
         payload = {'code': code}
         return self.request(Route('PATCH', '/guilds/{guild_id}/vanity-url', guild_id=guild_id), json=payload, reason=reason)
 
+    def get_member(self, guild_id, member_id):
+        return self.request(Route('GET', '/guilds/{guild_id}/members/{member_id}', guild_id=guild_id, member_id=member_id))
+
     def prune_members(self, guild_id, days, *, reason=None):
         params = {
             'days': days