fixed a few bugs like 'end-dumping' in speedx. Added effects lum_contrast and gamma_corr
Staged a few effect files (lum_contrast, gamma_corr, time_symetrize, etc.)
Towards Python3 compatibility
Changed version number
improved audio reading. Fixed bug at rewind (?)
Fixed bug in audioreader. Hopefully.
put optional depencies above installation in docs
fixed bugs in ffmpeg_reader, refactorized reinit and init.
Simplified imports (now relative), fixed a few Py3 bugs
fix typo in close_proc
Merge pull request #17 from fullscreeninc/master

fix typo in close_proc
Changed doc theme, simplified to_gif command for Windows compatibility,
made function call_subprocess
Fixed resize with PIL on Python3. Fixed image_write in ffmpeg_writer for Py3
Added theme kr for docs. Added embryo of test suite (really an embryo)
Now para=False in to_videoclip. Now actual videos can be made with Python3 !!!
towards a numpydoc-style documentation
still in the process of numpydocing everything
added version and many automatically generated doc files
Various bug fixes in writing (python3 compat, chunk division...)