Changed around much of the simulation code to simplify things.  The dt_integration parameter is now the important one for the simulation.
Committing old revisions.
Added a few more functions to the fid_math implentation. Work is now on revamping fid.cxx.
Changes are now consistent throughout the repository and examples.  Everything compiles, but no further testing has been done yet.
Debugged new fft wrappers and first implementation of wvd.