Add opencv as an extra dependency. Update download page. See Breakthr…

…ough#111.

Update website version number.

Change PyPI project from "PySceneDetect" to "scenedetect".

Release v0.5.
Fix bug with incompatibility and Python 2.7 from makedirs.

Modify SceneManager detect_scenes method to raise a ValueError if cal…

…led with frame_skip != 0 and a valid StatsManager (frame_skip option is not supported when caching frames using a StatsManager).

Fix wrong parameter typo in string for the case of combining -fs/-s.

Prepare documentation for v0.4 release.

Prepare v0.3.6 release.

Prepare v0.3.5 release.

Prepare v0.3.4 release.

Update PyPI package for v0.3.3 release.