Added execution engine
The c program passed to the compiler is directly executed

git-svn-id: http://svn.fmi-plovdiv.org/svn/students/0901261034/trunk/MTProject@14 12c2f946-5e95-4fc4-9837-bc5cc44074e2
merge

git-svn-id: http://svn.fmi-plovdiv.org/svn/students/0901261034/trunk/MTProject@15 12c2f946-5e95-4fc4-9837-bc5cc44074e2
Parsing function definitions
- return type, reuturn statements and paramters are not handled yet
Single line comments
- Lexer now ignores lines strings starting with // to the end of the line
merge