Add support for remaining opcodes so that most Lua programs can be JITed

[dibyendumajumdar]

The few remaining opcodes are OP_BOR, OP_BAND, OP_BXOR, and OP_NOT - adding these would mean that almost all Lua code can be JITed.

The code generation for these will not be inline however - they will simply call appropriate C functions.

[dibyendumajumdar]

Fixed in 0.18