Moved compiler_data ref into the main module JRubyVisualizer
pretty_string() to get a formatted string of ir instrs
Open IR window separately and integration of pretty printer to changes of ir_scope property
Run a pass on all scopes and then trigger this change
Step Button for running ir passes step by step (just a prototype)
Correct stepping of ir passes with debug output
Better example for optimizating IR
Forgot to set the JRuby debug flag
Eventing on stepping passes works; Retrieving the new IR scope however not