* NEW: Support for inequality operators in the operator interface.
* NEW: The Sgn() function can be implemented by the operator interface.
[GB.GMP]
* NEW: BigInt now supports inequality operators.
* NEW: New methods: Odd(), Even()
* NEW: Logical operators as static methods: And, Or, Xor, Not.
* NEW: Bit manipulation as static methods: BSet, BClr, BChg, BTst.
git-svn-id: svn://localhost/gambas/trunk@5828 867c0c6c-44f3-4631-809d-bfa615b0a4ec
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