Fix Issue #15
Merge branch 'working' of github.com:landakram/hopper into working
Add print method to modules and objects in ast.rkt
Refactor adding methods in ast.rkt
Remove print from object type definition in ast
Remove print from object type definition in ast
Cleanup old code
Refactor grace:type:method and add builtin methods to superclass grace:type
Merge branch working from upstream