modifying interface for eval function
changing the parameters for eval function in interpreter
implementing codegen
Merge branch 'code' of https://github.com/kyzhai/SMURF into code
updating
Merge branch 'code' of https://github.com/kyzhai/SMURF into code
very basic functional call done
Merge branch 'code' of https://github.com/kyzhai/SMURF into code