added note about natlab.sh in README
added very basic profiler

only works for some types of method calls
  - interpreted calls are known not to work.
  - function calls without semicolon show up as interpreted expressions
    somehow

don't know about overhead yet. no decay and some other stuff

added some basic benchmarks to demonstrate correctness

also refactored some jitcompiler methods into utils/llvmutils
added basic visualizer