trunk preprocessor:

* reorganized symbol table so that internally symbols have a unique integer ID (as a result, sparse code is temporarily in a broken state)
* rewritten from scratch ModFile::evalAllExpressions()
* {load,save}_params_and_steady_state moved to NumericalInitialization.{cc,hh}
* fixed bug related to endval block


git-svn-id: https://www.dynare.org/svn/dynare/trunk@2441 ac1d8469-bf42-47a9-8791-bf33cf982152