Updated TODO list
Updated string bundle
Moved image registration to ImageProcessor.mergeRegistered()
Added option to sample frames to file
Fixed FrameGrabber
Updated string bundle
Added dialog to select subframe merge algorithm
Updated TODO list
Added progress bar during sampling and processing
Revert "Added progress bar during sampling and processing"

This reverts commit 670ea7627dd91ba8fd207dc387f75d0d4736acc9.
Revert "Revert "Added progress bar during sampling and processing""

This reverts commit 5288e25eb072cb2f25afc00da9b131e79cd89e47.
Fixed ImageRegistration ModelMatcher failure
Merge branch 'master' of https://github.com/zscott92/astrostack
Updated for v0.3.1 release