Improved the Hough transform line detector, as suggested by mabuchner in Issue #1871. Also expanded the search radius for the non-maximum suppression filter.
Merge branch 'master' of https://github.com/BradLarson/GPUImage
- fix for black frames as per https://github.com/BradLarson/GPUImage/issues/1255#issuecomment-68141433
- Updated podspec to 0.1.9