Decorator proof of concept. [1303]

This is fallout from today's meeting…the (poorly named, for now!)
transform_flatfields decorator will attempt to convert any incoming
parameters that are SingleBandedImage-s into an ImageSequence
containing *only* the incoming parameter.

It' also *tries* to be smart about auto-converting the results of the
wrapped function back into its original representation.

This can be tested by dumping the example code in the following link
into your Jython Library and then creating a new formula that refers
back to the testFunc1000 function.

    https://gist.github.com/jon4than/21227a868d15f35c67ca

You should now be able to run testFunc1000 (with data from
getADDEImage) from the Jython Shell. Here's what I was using as a test
from within the Jython Shell:

    _, megaObj = getADDEImage(**params1)
    print megaObj
    print type(megaObj)
    result = testFunc1000(megaObj)
    print result
    print type(result)

(please try to disregard my stupid testcode names!)