Overloading (CVS commit) - Relationals implemented

- moved motox_try_overloaded_binary_op to motox_try_overloaded_method_op =
in=20
motox.c
- created motox_try_overloaded_function_op
- moved motov_fillArgs to motox.c
- changed static storage to non static for motoi_callEDF and motoi_callMD=
F in=20
motox (to permit call from inside motox.c). Prototypes in motoi.h.
- implemented iset_comp2 in intset_op.c (for comparing with size).
- implemented iset_equal iset_notequal iset_gt iset_lt in intset_op.c
- added operators to IntSet.i
- changed over_intset.moto in tests

Adding relational was smooth!

Stefano