Fixed crossValidation allPartitions bug
Actually, the change in bd13c06 was never necessary since the use case for the allPartitions flag was using a set of images as an extended gallery for a commercial matcher. In this case, the crossValidation flag does not need to be set nor does the commercial plugin need to be enclosed in CrossValidate(...).
Fixed bugs with MetadataDistance
Some refactoring of GUI transform code

Use better tricks to make objects on the main thread.
Move logic from defunct GUIProxy classes into QLabel subclasses.
Update README.md
Update README.md
added eval landmarking shell code
Fix HOG descriptor
Remove Flatten, dupe of Contract
Merge branch 'master' of https://github.com/biometrics/openbr
Merge changes
Removed debug statement in core
Add DropFrames transform to skip frames in a video
Make AggregateFrames play nice with DropFrames
Added newFormat to EmptyGallery
Merge branch 'master' of https://github.com/biometrics/openbr
Fixed up some old debugs, added some comments
Follow the advice of @caotto - make DropFrames an UntrainableMetaTransform
Apply same mods as HOG to HOF
DropFrames is better, no need to check for empty in AggregateFrames