* Copy (ffmpeg) .dll to fix #6

This attempts to copy all .dll files in build directory,
where should be only ffmpeg .dll

* Update appveyor.yml

Use literal style block to avoid unnecessary blank lines
http://stackoverflow.com/questions/3790454/in-yaml-how-do-i-break-a-string-over-multiple-lines/21699210#21699210

* Update appveyor.yml

Fix source dir for ffmpeg .dlls

* Update setup.py

Include ffmpeg .dll into wheel

* update README, licensing, fix dll copying, add video test

* fix indentation

* disable test for now to get artifacts

* Add FFmpeg license, inject cv2 to PATH in __init__, enable video test

* disable video test on other OS

* Build on Travis CI using manylinux

* Fix appveyor (maybe)

* Update following suggestions from opencv #6774

* Testing...

* Testing...

* Testing OSX build

* Testing OSX build

* Build on Travis CI using manylinux

* Fix appveyor (maybe)