* DynareBison.yy: use "filename" rule for initval_file, dynasave, dynatype and datafile option
* DynareBison.yy: removed some spurious syntaxes for dynatype and dynasave
* ComputingTasks.cc: bugfix for dynatype
* cosmetic changes to dynatype.m and dynasave.m


git-svn-id: https://www.dynare.org/svn/dynare/dynare_v4@2145 ac1d8469-bf42-47a9-8791-bf33cf982152