Added check for memoization tag
Added first very naive implementation of MemoizationCache
Added initial code to support memoization in rascal functions
Added small benchmark test
Removed the Type argument from the memoization call
Added rascal test for memoization feature
Implemented new version of the MemoizationCache, now with good memory management
Fixed warnings
Added some stuff to help the GC
Removed custom memoization for the parser generator
Merge branch 'master' of github.com:cwi-swat/rascal