typo
Crush all the pngs.

Output Log: https://gist.github.com/dak180/d92428fcf2e9ca3b924a
Fixed persistence of Toggle State (Fixes #43)
Merge branch 'topic/pngcrush' of https://github.com/dak180/AlternateResourcePanel into dak180-topic/pngcrush
Adjusted some of the Image storage to maintain history from Pull request (related to #44)
Merging Pull Request of dak180-topic/pngcrush to develop (related to #44)
Version 2.5.1.0 ready
Merge 2.5.1.0 to master