Split models.py into several files (#398)

* Move exception models into separate file
* Move thread model into separate file
* Move user model into separate file
* Move group and room models into separate file
* Move page model into separate file
* Move message model into separate file
* Move basic attachment models into separate file
* Move sticker model into separate file
* Move location models into separate file
* Move file attachment models into separate file
* Move mention model to reside with message model
* Move quick reply models into separate file
* Move poll models into separate file
* Move plan model into separate file
* Move active status model to reside with user model
* Move core enum model into separate file
* Move thread-related enums to reside with thread model
* Move typingstatus model to reside with user model
* Move emojisize and reaction enums to reside wtih message model

fbchat/_poll.py

@@ -0,0 +1,52 @@
+# -*- coding: UTF-8 -*-
+from __future__ import unicode_literals
+
+
+class Poll(object):
+    #: ID of the poll
+    uid = None
+    #: Title of the poll
+    title = None
+    #: List of :class:`PollOption`, can be fetched with :func:`fbchat.Client.fetchPollOptions`
+    options = None
+    #: Options count
+    options_count = None
+
+    def __init__(self, title, options):
+        """Represents a poll"""
+        self.title = title
+        self.options = options
+
+    def __repr__(self):
+        return self.__unicode__()
+
+    def __unicode__(self):
+        return "<Poll ({}): {} options={}>".format(
+            self.uid, repr(self.title), self.options
+        )
+
+
+class PollOption(object):
+    #: ID of the poll option
+    uid = None
+    #: Text of the poll option
+    text = None
+    #: Whether vote when creating or client voted
+    vote = None
+    #: ID of the users who voted for this poll option
+    voters = None
+    #: Votes count
+    votes_count = None
+
+    def __init__(self, text, vote=False):
+        """Represents a poll option"""
+        self.text = text
+        self.vote = vote
+
+    def __repr__(self):
+        return self.__unicode__()
+
+    def __unicode__(self):
+        return "<PollOption ({}): {} voters={}>".format(
+            self.uid, repr(self.text), self.voters
+        )