Sedfitter

- Fixed calculation of indices for monochromatic 'convolution'.

- Added missing ez_setup.py file.

- Fixed a bug with filter normalization if filter was given in
- increasing wavelength. [26]
- Fixed plotting of source names when using Latex. [25]

- Added support for a new model directory format that stores all SEDs
- in a single file. [16]
- Added a new Fitter class that provides an OO interface to the
- fitter. This makes it easier to fit sources one by one without
- reloading models. [12]
- Various bug fixes.

- Added documentation on convolution.
- Added page about accessing model packages.
- Renamed `wavelength` attribute on `Filter` and `ConvolvedFluxes` to
- `central_wavelength`, renamed `r` attribute on `Filter` to
- `response`, and removed `wav` attribute for `Filter` since it was
- reduntant with `nu`.

- Initial release