Add worklist addition to public API.
install aliases and names with and without underscores
Add randscale_n op, a scaling rand_n.
fix div_i and div_I to floor rather than round towards 0
gcd needs to abs both arguments before calculating
Enable storing serialized data in bytecode section

This avoids the whole base-64 of an MVMString and so forth, speeding
both startup and compilation, cutting memory footprint and decreasing
the disk size of NQP and Rakudo compilation output.
add op uniisblock to look up unicode blocks directly
add block lookup, and (evil) hack for property value lookups
Correctly handle active handlers and continuations

Need to slice off handlers since the reset and restore them on invoke.
throw div by 0 in bigint division
Fix check/accepts non-cache case of istype.
throw div by 0 in mod, too
fix copypasto, lowercase "zero"
div_i should throw Division by zero, too.
Fix GC bug in continuation cloning.

Discovered/tracked down by nwc10++.
Add MVM_frame_try_return to public API.
Implement cloning of MVMCallCapture.
Fix bitwise string xor.
Fix exit code handling in shell.
Add missing return value deconting.

Or at least, the common case. Fixes explosion in Rakudo spectests.