* Fix Bug #571
ConversationHandler will not process CallbackQuery if per_chat=True and
the CallbackQuery has no message attached to it (as is the case with
buttons on inline results)
* Adds test case for CallbackQuery without Chat
* conversationhandler.py: add per_chat, per_user and per_message
* test_conversationhandler.py: test case per_user=False
* test_conversationhandler.py: add test for callbackqueryhandlers
* ✏️ Fix accidental typo in logging format
* stripping token of whitespaces before starting bot
* Line feed
* CommandHandler checks if message is for this bot
* CommandHandler checks if message is for this bot
- Added tests
* Fixed tests in test_conversationHandler to work with new commandhandler structure
* type in conversationhandler test
* Create a Request class which maintains its own connection pool
* When creating a Bot instance a new Request instance will be created if one wasn't supplied.
* Updater is responsible for creating a Request instance if a Bot instance wasn't provided.
* Dispatcher: add method to run async functions without decorator
* Dispatcher can now run as a singleton (allowing run_async decorator to work) as it always did and as multiple instances (where run_async decorator will raise RuntimeError)
* initial commit for conversationhandler and example
* implement simple Promise for run_async/conversationhandler
* refactor Promise._done to done
* add handling for timed out Promises
* correctly handle promises with None results
* fix handling tuple states
* update comments on example
* Added a first test on the ConversationHandler.
* Fixed a small typo.
* Yapf'd.
* add sphinx doc for conversation handler
* fix title for callbackqueryhandler sphinx docs
