Got emitting working

Each op can define how its arguments are laid out via the
InstructionType function it uses.
Fixes #54
Merge branch 'master' into emit-dev
Stream jump management
Register utilities
Ops directly on the stream
Localization unecessary.
Extended chunk stream

Keep JVML specific details in an extended stream.
Load asm libs at load time.
Make getConstant public
Auto loadk

Make sure to alloc and free with RK constants using allocRK and freeRK