Inject full Emoji to Reaction if we have it.

Reaction objects with custom Emoji are partial. If we know of this Emoji
(can find it on this client) then inject it. Otherwise, leave it as a
hollow Emoji. We can still react with a hollow Emoji, but can't get other
metadata about it.

discord/iterators.py

@@ -72,6 +72,7 @@ class LogsFromIterator:
     def __init__(self, client, channel, limit,
                  before=None, after=None, around=None, reverse=False):
         self.client = client
+        self.connection = client.connection
         self.channel = channel
         self.limit = limit
         self.before = before
@@ -125,7 +126,9 @@ class LogsFromIterator:
             if self._filter:
                 data = filter(self._filter, data)
             for element in data:
-                yield from self.messages.put(Message(channel=self.channel, **element))
+                yield from self.messages.put(
+                    self.connection._create_message(
+                        channel=self.channel, **element))
 
     @asyncio.coroutine
     def _retrieve_messages(self, retrieve):