* added copyright and license notice to all source files
* used SVN changelog to determine first copyright year
* used 2003 if file present from the creation of SVN repository
git-svn-id: https://www.dynare.org/svn/dynare/dynare_v4@1565 ac1d8469-bf42-47a9-8791-bf33cf982152
* in the .m file, corrected "if exist" and "mex" lines
* in the .c files, fixed problem with model local variables
* reverted Fehrat's change: power operator in C is pow(), not pow1()
git-svn-id: https://www.dynare.org/svn/dynare/dynare_v4@1301 ac1d8469-bf42-47a9-8791-bf33cf982152