added support for keyword-arguments in wrapped functions for numerical derivatives
More robust test of wrap(): now uses a function that does not work with numbers with uncertainties.
Added the names of people who made interesting suggestions.
Merge branch 'master' into Trash_test_wrap_patch_newville
Fixed variables imported by force from the master branch.
Attempt at using the decorator module in order to preserve the signature of a wrap()'ed function. Works on a simple case (f = lambda x: 2*x), but the unit tests fail with infinite recursion.
Merge branch 'wrap_keyword_floats_decorator_module': aborted attempt at handling keyword arguments given to a wrap()ped function through the decorator module.
Merge branch 'wrap_patch_newville'. Removing branch with patch from Matt Newville for a keyword-aware wrap() (version not used).