ReST directive was used. Also fixed some other ReST directives that were
not correct and removed some warnings during buildbot checks.

- Used lunix style slashes - works on most systems
- Removed all trailing whitespaces

bug #2709

extended morphological operations to handle arbitrary number of channels and CV_64F type; extended filter2D to handle CV_16S type. added test to check the supported formats; added description of supported formats in various filtering operations.

extended Sobel & Scharr description (ticket #1555). Added CV_32F/CV_64F format combination in sepFilter2D.

* Fixed display of struct and class definitions (except classes with base class specified).
* Fixed formatting and referencing errors in several documentation files.

fixed and improving formatting in opencv2refman.pdf. added support for n-channel mask in Mat::copyTo() and n-channel images in cv::compare(). fixed 2 compile warnings in opencv_python.

* Added manual port for getTextSize;
* Fixed bugs in "native camera" sample;
* Added 15-puzzle sample.

Some reST syntax correction. Now the PDF documentation builds correctly under Windows using MIKTEX. Some update on the tutorial structure. Some CSS syntax correction. Windows Install Tutorial v0.4.