Enforce scalar container type constraints.

Fixes various tests that relied on them being enforced.
Implement checking post constraints.
Implement nqp::p6isbindable.

Fixes various of the remaining multi-dispatch issues, and other things
that relied on multi-dispatch, such as transliteration.
Fix error reporting.
Implement nqp::p6decodelocaltime.
Enable $*TZ on JVM.
Sync CORE.setting ordering with Parrot Makefile.

No reason for them to be different. timotimo++ for noticing.
Finish post-constraints trnaslation.
Fix over-sharing bug in bind-check multi dispatch
Remove debugging code.
Generic instantiation in signature binding.

Handles constructs like (::T, T).
Switch from sprintf to p6 interpolation.

Don't use sprintf (which doesn't work well yet in JVM) for something we can do with good old interpolation.
Merge branch 'nom' of github.com:rakudo/rakudo into nom