merge

git-svn-id: http://svn.fmi-plovdiv.org/svn/students/0901261034/trunk/MTProject@15 12c2f946-5e95-4fc4-9837-bc5cc44074e2
Initialize pointer to 0
Merge branch 'master' of github.com:ironsteel/dragonc
Merge branch 'master' of github.com:nayyden/dragonc
function args try
Merge branch 'master' of git://github.com/ironsteel/dragonc
function arguments, symbol table and context manager