Enable console input history
add JIT threshold setting
introduce IR’s JITCompiler
add wiring for JITting code in the background

heavily inspired on JRuby’s InterpretedIRMethod
split JIT and compile modes
compiled functions inherit from AbstractFunction
interesting testcase :) (TO BE NUKED)
ignore this JIT test during travis runs
fancy helper for positional parameter retrieval
store the synthetic method name and sigs somewhere
move closer to fib-like fn compilation
actually use fib as the driving test