Re-phrased some odd wording.
Fix the bug 3440.
fixed examples for opencv 2.4.8
fixed whitespace
proper initialization for ccimpl in bool CascadeClassifier::read(const FileNode
removed whitespace at end of line 96
grabcut.py sample: Allow drawing rect from bottom/right

The grabcut sample script isn't able to create rectangles correctly that are
drawn from e.g. bottom-right to top-left.
This small commit uses four min() calls to determine the correct
top-left point of the rectangle.
It also removes some unnecessary white spaces before colons.
fixed spelling and removed return images
Merge pull request #2310 from SpecLad:merge-2.4
Merge pull request #1851 from dneelyep:patch-1
Merge pull request #2313 from m3d:patch-1
Merge pull request #2311 from SvenWe:master
added performance tests for NLMeans
Updated DisplayImage.cpp program to compile

CV_WINDOW_AUTOSIZE -> WINDOW_AUTOSIZE
removed return images and fixed cv2 names
added 3-channel support to arithmetic operations
undo changes of cv2.cv.* functions/constants
Merge pull request #2317 from blueskymonster:master
Merge pull request #2322 from berak:b_cc_read
fixed bug reported by Irina K. Also tried to fix LBP detector regression in quality (probably it did not help but still ...)