Instruction mnemonics are not usable as member names

[roscopeco]

Currently it is not possible to use instruction mnemonics (e.g. invokespecial, d2i, fconst etc) as member names.

These are perfectly valid JVM member names. The grammar should be extended to allow this.

Likely it'll need to allow the individual instruction tokens in the membername rule, which is a bit verbose, but probably the cleanest way to do it with Antlr.