Adding the mover.py file.
Added Filename and TargetPath fns

...with some test code.
Tested on a real file.
corrected bug w multi-disc sets
Tested (using debug mode)
Tested against full mp3 collection

Includes support for unknown artists/albums. Those can be retagged later and
re-moved.
Added code to print files being copied.
Starting to include argparse.
completed argparse code

Fully controllable from the command line.
Corrected shebang path

...and made executable.
Fixed unit tests.
Cleaned up exception handling & added untested move code.
Added code for better handling of dupe files.

Still need to handle case where there's a dupe file name, but the user still
wants to overwrite the destination file that's already there.
Added some collision handling code.

If there's already a file at the destination path with the same
name as the one we're trying o create there, and the files are not identical,
we print out some useful data about the two files and let the user decide
whether to keep the existing file or replace it with the new one.
Verified file move code, cleaned up spurious print statements.
Corrected weird bug w/r/t disc #

Encountered a file that said it was disc #0. Now we require that
disc/of
disc # > 0
and
of > 1
Adding 'echonest.py' -- uploads an MP3 file to echonest

for automatic detection, which we attempt to put into that file's i3D3 data.
changes: scrub/force

- added new cmd line parameter -f -- if set, we force the move/copy even in
  the case of duplicate files
- Added title casing to the Scrub(0 function. Noticed that it mangles Alex
  Machacek to Alex MacHachek, turning him Scots. Oh, well.
Modified the mover code artist/performer

some files from Amazon use the artist ID3 field to contain a list of all the
performers on the track, and use the 'performer' field for the name of the
album artist.

Modified so that when both artist and performer are present, we use the
shorter of the two fields as the artist name.
Changed dir/filenaming

Now, we
- use only lowercase letter
- spaces relaced w '-'
- disc # and track # separated by '_'