can_haz_1252

can_haz_1252

I have patches with the glue to hook in windows-1252 codepage support.

I don't know whether that's a help or distraction for current the charset work.
If the latter I can hold off and adapt them later, if the former it would be
3 PRs on MoarVM, nqp, and rakudo, or I could just send patches or whatnot.

From the moarvm git log:

Author: jnthn <jnthn@jnthn.net>
Date:   Fri Feb 14 21:01:50 2014 +0100

    Correct Latin-1; add Windows-1252.
    
    The Latin-1 implementation we had actually did Windows-1252. We're not
    HTML 5, so should actually Latin-1 when asked to. Keep the original
    code around as a Windows-1252 implementation.

Locally:
bri@atlas:~/git/rakudo$ ./perl6-j -e 'Buf.new(0x80).decode("windows-1252").say'
€
bri@atlas:~/git/rakudo$ ./perl6-j -e 'Buf.new(0x80).decode("iso-8859-1").say'
€
bri@atlas:~/git/rakudo$ ./perl6-m -e 'Buf.new(0x80).decode("windows-1252").say'
€
bri@atlas:~/git/rakudo$ ./perl6-m -e 'Buf.new(0x80).decode("iso-8859-1").say'
€