It hasn't been used since f82c04f4. Also, the line adding the script had
an unneeded pathto call, so the script was being loaded from the wrong path
anyway.

Also, removed the one from modules/python/src2/cv.py and cleared its
executable bit, since it's not a script.

added logo to the online docs
moved quick-search panel
added logo with white sign

updated docs links in tutorials

changed OpenCV version to 2.3.2

Added the "Camera calibration With OpenCV" tutorial. Extended with a few global links the conf.py file. Corrected an error in the linux_install.rst and one in the cascade_classifier.rst file. 

Added to the tutorials the "Support Vector Machines for Non-Linearly Separable Data" contributed by Fernando Iglesias García. Corrected a mistake in the gpu-basics-similarity.rst file. 

Added the "Similarity check (PNSR and SSIM) on the GPU" tutorial. Corrected an highgui TOC tree mistake.

Added tutorial for features2d using homography to find a planar object (Based on the well known find_obj.cpp

Added the "Mask operations on matrices" tutorial (with its sample). Plus modified some other core tutorials.