Fix link in main page
Make the improvement in commit d3d1a39 effective
Fix front page links Update VERSION file to 2.0.0
Fix builds with OCL <= 1.1 due to change in program wrapper
Include OS type in package file name
Review user manual, API code comments and main page
Fix links in main doc
Update version to v1.3.2 in CMakeLists.txt
Closes nunofachada#1 : Make examples optional
Update documentation to account for the CMake build system