Fix for building with GCC and CLang
CMake variable descriptions updated
"Building with CMake" article updated
BuildToolkit.cmake cleaned up and renamed
"TestCases" project and all relating variables removed; custom script added for building environment
DrawAppliInit is copied from occt root to CMake binary dir if the file exists
rebuild platform dependent code by cmake cleaned up
Flex & Bison compiler flags added
RelWithDebInfo OCCT libraries are moved to libi folder; the binary is moved to bini one
CMAKE_BUILD_TYPE is set as Release by-default for a single-configuration generator
env.bat in installation folder has default value of CASDEB that equals to the build type of the last installed OCCT libraries
"building with CMake" article updated
All CMake meta-projects for OCCT are put to OCCT code (including fragments previously generated by WOK).
"/bigobj" compiler flag added to TKQADraw because of the size of its object file
[GeomToStep & Graphic3d] private headers are included from current dir of including source file
