RF: delete fmristat.delay code

It's completely commented and makes the reader worry about parts of the
code that are in fact solid so remove for now and come back to it.
ENH: A script which serves as a wrapper to FmriRealign4d

This does argument parsing, file-handling, figure generation, etc.
Small addition - axis labels.
TST: Test the 4d_realign script.
RF: Updated cli of motion correction to new interface.
RF: Added a scripting sub-module to the registration module.
RF: Proper installation/import of the scripting interface to SpaceTimeRealign
BF: If matplotlib is unavailable, plotting is not possible.
RF: Minor cleanup
RF: Use the between-scans parameters. Remove additional references to MPL.

Also : changed default behaviors, added documentation, added return variable.
TST: Added a module test of the space_time_realign script.

This one doesn't require matplotlib, and will be triggered regardless.
RF: Allow saving mc parameters.
DOC: Be more explicit about the parameters saved.
TST: Try runnning the test in a temporary directory, for permission's sake.
RF: Save Euler angles instead of whatever it is SpaceTimeRealign gave you.
ENH: cut_coords -> n_cuts (in coord_tools.py)
ENH: len(np.shape(cut_coords)) == 0 -> isinstance(cut_coords, numbers.Number)
BF: Trying to make sure that we glob the arguments correctly.
ENH: raising a meaningful error message here when map3d.ndim != 3
ENH: removing abnoxious returns
ENH: warning about k < 2 before forcing value to 2
ENH: removed empty line in list comprehension
ENH: reverted changes to nipy/COMMIT_INFO.txt