stub in container
port more container code
add more container code
fix wrong message
fix a GC fail, jnthn++
some small fixes
small refactor in coerce.c
complete container config
remove reduplicative type checking
better msg in hll.c
fetch and store in container should work now.
Fix a thinko.
Revert "small refactor in coerce.c"

This reverts commit 15a1e63c0c49208011869365168e5c5b41a4c4cc. The
original was correct. The refactor takes a pointer into the C stack
and keeps hold of it beyond the function returning, which means junk
will be found there in the future.
Merge branch 'master' into container
Missing write barriering of assigns.
Container fetch should receive target register.

This should fix the code pair fetch, at least once the decont op is
implemented properly.
added nqp::tonum_I
correct pointer type, filences warning
added and mapped nqp::fromnum_I
added and mapped nqp::base_I