Deleted tests that have served their purpose.

Started renaming Benchmarks (not done yet).
Completed renaming of benchmarks.
Removed remainders of first attempt at computing stack size.
Fix in the type checker: "undeclared variable t1".
Merge branch 'master' of https://github.com/cwi-swat/rascal.git
Fixes in the subscript tests.
Reorganized executeProgram and added an executeFunction.
Added an RVM argument to RascalPritimive.init to enable calling an RVM
function from a RascalPrimitive (used for testsuite).
Fixed handling of testsuite_init.
Changed test generation: argument types are now also passed to
testsuite_add
Merge branch 'master' of https://github.com/cwi-swat/rascal.git
Prepared testsuite_add for getting Type arguments.
Merge branch 'master' into rascal-to-jigll