Added forgotten cases for subscript on adt/node/tuple (including
negative indices)
Added muRascal primitives
- generalized size to maps
- added a keys function to get the keys of a map.
Added ENUM_MAP.
Added BTemplate benchmark (not working yet)
Added Template example.
Added various tests
"has" now implemented at compile-time.

Solved various minor problems.
Merge branch 'master' of https://github.com/cwi-swat/rascal.git