2.0.0

* Update python version
* Add pyproject file and remove setup.py and requirements.txt
* Update project structure and improve code

[FIX] Add 'load_stylesheet_pyqt5' to retrocompatibility

[FIX] Add notes about PySide and PyQt4 in readme
[NEW] Add deprecated warnings

[FIX] README.md renamed to README.rst because pypi compatibility

[FIX] README.rst badge links
[FIX] Remove compile call when import this library
[NEW] Add tests

[DEL] Drop support to Python 2.7, 3.2, 3.3 and 3.4

[DEL] Drop support to PyQt4 and PySide
[NEW] Add support to Python 3.6
[NEW] Add tests to PyQt5
[NEW] Add automatic deploy on TravisCI
[NEW] First stable version

version 0.0.3

Theme fixies

Merge branch 'release/0.1.2'