[3rd attempt] fixed HOGDescriptor::detectMultiScale() to group weights as well as ROIs
Reverted back to the previous method where a public method groupRectangles was added to HOGDescriptor to take care of ROI and weight grouping
Added spacing in a nested template argument list.
added documentation for OpenGL interoperability
PvAPI support on Windows with MinGW (PR #1038 applied to the branch 2.4)
Add IPP erosion and dilation
Fixed bug #3101, problem on ellipse2poly function
Add sort_by_key for oclMat.
Most codes are ported from AMD's Bolt library.
Four methods are implemented:

SORT_BITONIC,   // only support power-of-2 buffer size
SORT_SELECTION, // cannot sort duplicate keys
SORT_MERGE,
SORT_RADIX      // only support signed int/float keys
Added brackets around line 888-892 for correct code!
Rename PVAPI_DECLARATIONS to PVAPI_DEFINITIONS
Add IPP mean and sum functions
Fix build errors
bugfix #3121: corrected calculation of blue channel index
adding/tuning multiple run for perf tests failing due to big deviation (functions using TBB can work so)
Some changes in sum and mean functions
Some modifications to sortByKey API.
Add documentation.
Fix doc build error.
Some changes in erosion and dilation functions
fixing warning on shadowing local var (TEST_CYCLE_MULTIRUN uses 'r')
Added bugfix #2795
- changing license header
- fixed bug in QtKit when changing camera resolution