* Fix language bindings: various issues

* Fix language bindings: various issues
** remove a number of warnings in bindings generation
** give appropriate names for operator-overloading
** make sure Java language bindings are built with -fno-strict-aliasing, to ensure the optimizer doesn't produce bad code

* Also remove BitVector::equals(), which wasn't used and was inconsistently implemented (operator==() is still there).

(this commit was certified error- and warning-free by the test-and-commit script.)