Make it work under Win32/Rakudo* 2014.03.01 (again) - and fix #2 & #4

[meisl]

• fixed "bustage" as mentioned in https://github.com/jnthn/grammar-debugger/issues/2#issuecomment-19873420 (at least for me, on the system mentioned in title)
• made it more robust by intercepting only methods of type Regex rather than testing for "magical" names like BUILD, MATCH, orig, etc. (also fixes issue #4)
• added 1 sanity test for Debugger (giving it the input that it expects)

Although I'm pretty confident that taking this pull request as is will only make it work better (or, as in my case: work at all) - there are quite a few things that I hope to be able to provide soon; as listed below:

• TODO: enable color output on Win Console or simply output w/out color (just use Term::ANSIColor ain't enough on Win, and there's no perl6 equiv of Win32::Console::ANSI yet) (added some hints to README)
• TODO: refactor to eliminate code-dup between Tracer & Debugger, as well as provide same functionality as Grammar::Profiler::Simple (which is more or less stolen anyways :)
• TODO: factor out the actual thing to do on enter/leave regex breakpoints to be handled with that then), thus a) consolidating Tracer/Debugger/Profiler and b) make tests easier and c) open up
• TODO: make it faster by installing wrappers around regex methods once at the time &add_method is called rather than creating a new lambda every time &find_method is called (current perf is really near unacceptable in my setup)
• TODO: more tests (at least enough to feel safe for refactoring)
• TODO: test on more than just the one system mentioned in title, particularly Rakudo* 2014.08 which came out just recently

[meisl]

Re color output on Windows: right now I think it's fine enough to simply filter the output through perl5's Win32::Console::ANSI; like so: perl6 MyGrammar.pm | perl -e "use Win32::Console::ANSI; print while (<>)"

[jnthn]

Alternatively, use Console2, or AnsiCon, which know how to interpret the ANSI color codes. :-)

Thanks for the patches!

[meisl]

Thanks & yw :)

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Console2: http://www.hanselman.com/blog/Console2ABetterWindowsCommandPrompt.aspx AnsiCon: https://github.com/adoxa/ansicon

[meisl]

Crossed out the stuff that's in pr #7.