* added a function matlab_ver_less_than() for testing Matlab version
* updated dynare_config.m and build_matlab.m accordingly
* removed tests to check whether we are older than Matlab 6.5 (R13), since we don't support those old versions anymore
* removed a few unnecessary uses of eval()


git-svn-id: https://www.dynare.org/svn/dynare/dynare_v4@1936 ac1d8469-bf42-47a9-8791-bf33cf982152