Log
Add Opcode.paramTypes

I'll be getting rid of numParams in favor of paramTypes.length.
Change numParams to paramTypes.length in MOST places

I still have to modify the constructor, so a few references remain in
place.
Write Opcode(ParamType...)
Actually implement Opcode.getParamTypes
Opcode: Change to varargs constructor
Remove numParams constructor from Opcode
Comment out the numParams variable in Opcode