Add support to parse just a specific region of the image
Currently incomplete due to the lack of copy region in PlaYUVer frame
Fix bug which caused slow iamge navigation with some kinds of mouses.
Merge branch 'master' of https://github.com/pixlra/playuver
Merge branch 'master' of https://github.com/pixlra/playuver
Disable histogram if the dock is not visible
Minor bugfix in the video lock button and update frame properties when video is playing
Add seek buttons into the video toolbar