* Added methods to generate the original markdown/html formatted string from the entities contained in an update
* Added
* Moved the html/markdown parsing methods to `Message`
* Moved extract_* methods from helpers to the appropriate location
* Refactored text_markdown and text_html
* Refactored text_markdown and text_html for efficiency
* Fixed method call in conversationhandler
* Fixed method call in handler
* Fixed `make test` command on windows systems
* Improved method documentation
* initial commit for user_data
* add chat_data and use defaultdict
* fix chat_data copy-paste error
* add test for user_data and chat_data
* fix case where chat is None
* remove braces from import line