Add wrapper for benches
[ci skip]
Merge branch 'master' of github.com:samth/pycket

* 'master' of github.com:samth/pycket:
  Fix tostring on letrecs w/ multiple bindings.
  fix translation
  add paraffins to jit.py
  track immutability in the class, not as an extra field
kill useless tostring calls
fix r5rs for wrap
Tho valid, infinite loops are a bad idea in tests