Fix a bug of retinaParameters.
When colorMode is set to 0 via Retina::_init method, _retinaParameters's
colorMode variable is not correctly assigned.
Merge pull request #4 from Itseez/2.4

OpenCV changes
Fix bilateralFilter function
Make some tweaks to make `sum` operations less frequently
Fix build error.
Remove trailing whitespace.
rewrite gpu stereo multi gpu sample:

* use different approaches -> threads and streams
* clean up code
Deleted the now-empty ocl perf_precomp.cpp.

See pull request #1241 for why.
Merge pull request #1357 from SpecLad:less-precomps
Bug #3238 Android sample image manipulations blinks in non-preview modes fixed.
New Tegra detector with Android 4.3 support added. Manager version++.
fixed building OpenCV with IPP 6.x (different DFT API); added Canny and rectangular morphology (based on Alex Kapustin patches)
LibTIFF Win32 API back-end disabled for Windows RT.
Merge pull request #1343 from asmorkalov:android_img_manipulations_fix
Merge pull request #1338 from asmorkalov:android_tegra_detector
/apicontainer added to linker flags on WinRT to fix api test issues.
fixed bugs in rectangular morphology case
Add IPP support in compare function
Merge pull request #1359 from asmorkalov:winrt_tiff_api_fix
Merge pull request #1361 from asmorkalov:winrt_api_container