Improvements to DM analysis pipeline, diffuse fitting and lightcurve analysis.

• Added fitting code to fermipy.diffuse module
• Improved fermipy.jobs to deal with analyses with multiple components
• Added capability to plot global minimum in castro plots
• Added spectra for dark matter decay to DMFitFunction
• Added code to split simulations into smaller batch jobs
• Added fixed shape lightcurve to correct TS_var computation

Upates to the fermipy.jobs module.

• Added lots of documentation for the fermipy.jobs module.
• Minor changes to the fermipy.jobs module to work with the
  dark matter analysis pipeline (dmpipe).

0.17.1

This new release updates changelog.rst and version.py to see lightweight tags.

0.17.0

This release contains the following improvements and additions:

1. The LogParabola, PowerLawSuperExponetial and Dark Matter SEDs have been added to the sensitivity.py script.
2. There are a lot of additions to perform a stacking analysis. This can be applied for instance for the search of dark matter
   with a stacking analysis of Milky Way dSphs, Galaxy Clusters or other galaxies.
3. It contains scripts to send jobs to SLAC Batch Farm and collect the results.
4. It includes scripts and functions to perform all sky fits.
5. It also fixes a few issues with glon and glat in the localization (#225), and the wrong orientation of residual and TS maps (#216)

0.16.0

For notes on this release see:

http://fermipy.readthedocs.io/en/latest/changelog.html

0.15.0

For notes on this release see:

http://fermipy.readthedocs.io/en/latest/changelog.html

0.14.0

For notes on this release see:

http://fermipy.readthedocs.io/en/latest/changelog.html