Fix a bug of retinaParameters.
When colorMode is set to 0 via Retina::_init method, _retinaParameters's
colorMode variable is not correctly assigned.
fixed building OpenCV with IPP 6.x (different DFT API); added Canny and rectangular morphology (based on Alex Kapustin patches)
fixed bugs in rectangular morphology case
Merge pull request #5 from Itseez/2.4

Some changes in OpenCV
Add IPP support in meanStdDev, minMaxIdx, norm functions
Remove extraneous colon before ':basicstructures:'
Correct name of eye function
Merge pull request #1236 from pengx17:2.4_fix_retina_color_param
Merge pull request #1266 from kdrobnyh:core_stat_functions
Merge pull request #1374 from zacstewart:2.4
Removed incorrect iCCP chunks from GUI resources.

Also removed malformed tEXt chunk from a logo PNG.
Added interlace handling to PNG decoder.

libpng 1.5+ recommends a call to png_set_interlace_handling() if you use
png_read_update_info and png_read_image. It will generate a warning
without it.
Merge pull request #1360 from vpisarev:24_ipp_dft_canny_morphrect
Merge pull request #1371 from HapeMask:fix-png-warnings