ENH: Added a deprecation decorator function in the util module.
ENH: Added a deprecation decorator function in the util module.

The decorator can be used in order to mark deprecated functions. If these functions
are called, a DeprecationWarning will be raised.

In order to use the decorator, just

>>> from util import deprecated

>>> @deprecated()
... def foo(x)
...    return(x)

jjhelmus/wradlib,jjhelmus/wradlib