Perl 6 files are not highlighted correctly in UNIX / Win32 format

[azawawi]

For STD colorizer, highlighting is messed up if a file is a win32 file (cr-lf causes positions to be mismatched).

For Rakudo/PGE colorizer, highlighting is also messed up if a file is a Unix file under win32.

This relates to how STC manages newlines and positions. We need a general solution to fix both of the highlighters.

[azawawi]

I wont fix them until Perl 6 is production quality :)