Mss

- Python 2.6 to 3.5 ready
- MSS: code purgation and review, no more debug information
- MSS: add a shortcut to take automatically use the proper `MSS` class (fixes 5)
- MSS: few optimizations into `save_img()`
- Darwin: remove rotation from information returned by `enum_display_monitors()`
- Linux: fixed `object has no attribute 'display' into __del__`
- Linux: use of `XDestroyImage()` instead of `XFree()`
- Linux: optimizations of `get_pixels()`
- Windows: huge optimization of `get_pixels()`
- CLI: delete `--debug` argument

- MSS: little code review
- Linux: fixed monitor count
- tests: remove `test-linux` binary
- doc: add `doc/TESTING`
- doc: remove Bonus section from README

- MSS: fixed code with `YAPF` tool
- Linux: fully functional using Xrandr library
- Linux: code purgation (no more XML files to parse)
- doc: better tests and examples

- MSS: filename's dir is not used when saving (fixes 3)
- MSS: fixed flake8 error: E713 test for membership should be 'not in'
- MSS: raise an exception for unimplemented methods
- Windows: robustness to `MSSWindows.get_pixels` (fixes 4)
- :heart: contributors: sergey-vin, thehesiod

- MSS: fixed path where screenshots are saved

- Python 3.4 ready
- PEP8 compliant
- MSS: review module structure to fit the "Code Like a Pythonista: Idiomatic Python"
- MSS: refactoring of all `enum_display_monitors()` methods
- MSS: fixed misspellings using `codespell` tool
- MSS: better way to manage output filenames (callback)
- MSS: several fixes here and there, code refactoring
- Linux: add XFCE4 support
- CLI: possibility to append `--debug` to the command line
- :heart: contributors: sametmax