Pugs 6.0.8

[Autrijus Tang]

Pugs 6.0.8 has been release to a CPAN near you. In three day's time,
the newly assembled Pugs team implemented many changes:

* New example code snippet: examples/quicksort.p6
* Unit tests ported from th Perl5 tree. (alin, juerd)
* Hashes, Pairs and their access methods.
* Much more robust casting between arrays, lists and hashes.
* Fixed harness output problem on older perls.
* Many Posix-based IO primitives. (ycheng)
* Precedence for builtin unary/list functions are parsed correctly.
* "unless" construct.
* New primitives: "join", "split", prefix ++ and --.
* +>> etc changed to +> etc. (juerd)
* Stacking multiple prefix and postfix operators now works.
* @*INC, &?SUB, CALLER::.
* Tests for the "perlego" dialect. (juerd)
* User-defined function applications now takes arbitary expressions.
* Deep recursion detection.

Plus fixups for existing tests and build system, done by hcchien
and ingy. Also, much kudos for the helpful folks in #perl6 for
lots of insightful discussion and testing. Thanks!

Cheers,
/Autrijus/