- fixed conditional import for pep8 checker
- moved the import to a conditional python 3 import instead of a global
  one, since that seems to be the original intent. Addresses #1900
Manually decref cloned array.
Adding libraries bcm_host and EGL in setup.py to solve issues 2373 and 2364 on rpi running archlinux
Merge branch 'master' of https://github.com/ostralopi-tk/kivy
Adding '/opt/vc/lib' to library_dirs in the proper way for raspberry pi (archlinuxarm)
add Window.fullscreen and toggle_fullscreen for sdl2
add borderless property for Window and as a Config option, deprecate fullscreen = 'fake'
make borderless config option and window property work with pygame
remove border debug method
sdl2: add hooks for pyinstaller
sdl2:implement drop_file
pass only the file instead of a tuple
minor cleanup
fix unused variable in _window_sdl2
Merge pull request #2621 from aspidites/pep8_checker_fix

Pep8 checker fix
set borderless to false when fullscreen is switched from fake to auto
Merge pull request #2620 from kivy/sdl2_wqdrop_file

sdl2 drop file
Merge pull request #2610 from kivy/sdl2_fullscreen_reset

SDL2 - implement Window fullscreen, borderless and toggle_fullscreen
Merge pull request #2581 from ostralopi-tk/master

Solving issues #2373 and #2364 on rpi running archlinux