+ created a directory to store all the cmake modules that find software components

scripts :
 * modified linux-build, linux-clean, win32-build and win32-clean to use cmake modules


git-svn-id: svn://scm.gforge.inria.fr/svn/openvibe@681 c330d7e9-fc0c-0410-a5b3-fd85c6f5aa8f