Underscore.call

Bugfix: the *args in _.call() were completely disregarded in the implementation. be932c3 fixes this, and provides test cases with str.split().

The second commit, 3cf2f30, adds key-word-args to _.call() for the sake of completeness. A test case is added which uses dict.update().

All tests complete without error after both commits, under Python 2.6, 2.7, 3.2 and 3.3.