Implement gethostname()

Squashed commit of https://github.com/rakudo/rakudo/pull/221

Signed-off-by: Moritz Lenz <moritz@faui2k3.org>
Make Cool mutable, as per S02:1893

This just removes the error, this does not fix the subclasses not seeing any
augmentation.
Fix prentending_to_be typo before it proliferates
import NQP::Configure from NQP
[ChangeLog] add some items for 2013.11
curry *.[] and *.{} again
Merge pull request #223 from timo/postcircumfix_whatevercode

curry *.[] and *.{} again
WIP: creating buildplan thingies for native attrs.
WIP
make native attribute buildplan work on jvm, too.
Teach j-install about DESTDIR
Merge pull request #224 from timo/nativeattr_buildplan

buildplan operations for native attributes
Fix j-install for no DESTDIR
on the JVM, we are perl6-j
use nqp::spawn()
[Configure.pl] try to fix --gen-nqp=branch
[Configure.pl] fix previus "fix"

do not discard the desired minimum version so early
Merge branch 'run' of github.com:rakudo/rakudo into nom
bump nqp revision (nqp::spawn)
Flesh out Thread a little more; add $*THREAD.

This provides support for giving threads names, getting a thread ID,
provides a sensible stringification and enables $*THREAD as a way to
get a Thread instance for the currently executing thread (including
making it work on the initial thread, so that isn't a special case).