Support :temp/:let declarators in regexes.
change all nqp::substr+eq to nqp::eqat

This results in a performance boost of about 0.4 to 0.6% accross stage
parse and stage optimize!! /o/
We should only do .done at the end, leont++
bump nqp rev for eoffh fix on parrot
Merge pull request #309 from usev6/nom

add freebsd to KERNELnames
Normalize stdout/stderr handling to a single sub

So we can be sure we will handle both the same way in the future (as there
were subtle differences in the past).  This does *not* fix any problems yet,
it just makes sure I need to fix it at only 1 place.