cmake: rename AddOptions.cmake to addoptions.cmake and moved the cmake scripts into project/cmake/scripts
[win32] update path to cmake C/CXX flag override files
[win32] cmake: move generation of xbmc-config.cmake into xbmc dependency
update .gitignore
cmake: allow building of selected addons in xbmc-addons project
[win32] cmake: make use of ADDONS_TO_BUILD in make-addons.bat