Achilles Rasquinha b8825ca116 Pure Python MySQL instead mysqlclient (with Python C API) (#4280 )

* 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

2017-11-06 16:42:01 +05:30