Add default passbands, allow for user to specify special types in phot file.

* Add default set of passbands in resources directory.
* Add ALMA special bandpass type (in addition to, e.g., box)
* Add user to specify boxcar, delta functions, alma as a
  filter name in phot file instead of having to add them to
  filter wheel input file.
* Update README to talk about input file format.
Further changes to allow the user to add quick response systems
to their fits.  Documentation improvements.  Add scuba responses.