Mostly-complete non-indy support for JIT.
Document why we use real class for ivar table.
Fix signatures of instance/class super helpers.
Add doco for stack layout of super operations.
Document stack result after set/get ivar.
Fix up super forms in jvm6.
Use proper base for arg array building.
Fix stack layout for jvm6 set/get ivar.
Implemeng bignum in jvm6.
Fix arity, handling of sole-argument splat.
Don't push block if not given in super instructions.
Merge branch 'master' into non-indy-jit
Merge remote-tracking branch 'origin/master' into non-indy-jit
Merge remote-tracking branch 'origin/master' into non-indy-jit
Get --bytecode working again.
Update block scope handling for new ACP support in IR.
Ensure scope flags get computed before JIT.
Turn off background JIT until IR is thread-safe.
Try to sort out compiler passes for various JIT thresholds
Merge branch 'master' into non-indy-jit

Conflicts:
	core/src/main/java/org/jruby/ir/IRScope.java