Added build.sh to produce a universal iOS library
Add convenience method to GPUImageFilterPipeline to get a UIImage with specific orientation
Remove obsolete flag for appledoc build script
Edge detection filters now have an adjustable strength. Hough line detector is a little cleaner with the use of iOS 6.0 framebuffer reads.
Merge pull request #1035 from masonk/master

Make the Appledoc build again
Merge pull request #997 from cocologics/master

Add convenience method to GPUImageFilterPipeline
Merge pull request #955 from zimuliu/master

Added build.sh script to compile a universal library for iOS
Tweaked the documentation.