* added PyMYSQL instead mysqlclient-python
* added pymysql import
* fixed db module import
* foxed self._conn wrapper
* updated cursor migration
* removed existent converters
* some more fixes towards API port
* modified travis
* updated doctype and revereted yml
* modified travis
* refreshed logging
* raw fix
* moved from hard coded constants to declarable instances
* moved from hard coded constants to declarable instances
* refactoring and logging
* moved to global import declaration
* fixed codacy
* unfixed codacy
* minor fix
* binary_type has a single
* deprecated alternative
* merged with latest
* fixed merge conflicts
* using deprecated alternative
* raw fix
* stupid fix
* using StringTypes instead
* brutal hack
* log
* tundebazy to the rescue
* fixed content_hash error
* frappe/database.py
* frappe/database.py
* updated database.py
* updated requirements
* updated requirements
* fixed codacy
* fixed codacy
* moved from DatabaseOperationalError to pymysql.InternalError
* moved from DatabaseOperationalError to pymysql.InternalError
* fixed codacy
* empty commit
* fixed codacy
* fixed codacy
* [feature] document versioning #2469
* [minor] remove on_update from WebsiteGenerator
* [fix] delete shares when deleting user
* [test] don't run delete in background if test
* [fix] test_db
* [added] Deleted Document
* [fix] added track_changes in all documents
* [fix] add to deleted only if exists
* [fix] in_install flag in deleted documents
* [minor] name will always be reset
