finished buildPointList
added HoughCircles in ocl.hpp
removed useless comments in buildPointList_gpu()
finished ocl::HoughCircles
fixed a typo in ocl.hpp
Merge branch 'master' of git://github.com/Itseez/opencv into ocl_hough
added unit test for HoughCircles
added performance test
added documentation for ocl::HoughCircles
Merge branch 'master' of git://github.com/Itseez/opencv into ocl_hough
removed personal info from the license header
modified performance test for ocl::HoughCircles
Merge branch 'master' of git://github.com/Itseez/opencv into ocl_hough
Merge branch 'master' of git://github.com/Itseez/opencv into ocl_hough
Convert test image to losless format

This fixes java tests failing with new jpeg versions
Merge pull request #267 from pclove1:ocl_hough
Merge pull request #307 from taka-no-me:lena.png