Merge pull request avTranscoder#142 from mikrosimage/master

MIK fork: up to v0.5.8

Up version to 0.3.0

Merge pull request avTranscoder#71 from cchampet/build_requirements_git

Build requirements GitPython

Merge pull request avTranscoder#70 from cchampet/build_versioning_win…

…dows

Fix windows versioning

Alpha version