Log message

Added torture tests for special functions (automated evaluation for many
precisions and argument magnitudes).

Running the tests revealed over a dozen so bugs in various functions, that have
been fixed. (Other bugs also remain in some untested functions.)

	Modify	/trunk/mpmath/elliptic.py	diff
	Modify	/trunk/mpmath/function_docs.py	diff
	Modify	/trunk/mpmath/functions.py	diff
	Modify	/trunk/mpmath/gammazeta.py	diff
	Modify	/trunk/mpmath/libhyper.py	diff
	Modify	/trunk/mpmath/libintmath.py	diff
	Modify	/trunk/mpmath/tests/test_functions2.py	diff
	Modify	/trunk/mpmath/tests/test_gammazeta.py	diff
	Add	/trunk/mpmath/tests/torture.py	diff