Apply Xcode 5 suggested changes to projects
ShowcaseFilterViewController: Avoid retaining self inside blocks
GPUImageHSBFilter: Comment-out unused functions
Merge branch 'refs/heads/fix_xcode5_warnings'

Conflicts:
	framework/Source/GPUImageHSBFilter.m
Update GPUImageMac project to Xcode recommended settings
Merge pull request #1264 from rivera-ernesto/fix_xcode5_warnings

Fix Xcode 5 warnings