Merge pull request #12 from lgaribaldi/rotate-tag

Add check for rotate tag

Added 'vidio: ' to error messages

Merge pull request #7 from Krzysztofz01/frame-seeking-feature-implementation

ReadFrames updated to return RGBA image slice

buildSelectExpression func moved from video to utils

ReadFrame and ReadFrames added to README

ReadFrames no params validation added

Missing testing image added

Separate GetVideoFrame code removed

ReadFrame and ReadFrames tests added

ReadFrame and ReadFrames integrated into the Video struct

GetVideoFrame() nil frame buffer validation

GetVideoFrame() buffer param added

GetVideoFrame test for valid input, invalid path and out-of-range frame index