Added Healpix profile maps and update dependencies.

Added option to use HEALPix maps to define target profiles
Added code to write text files in the format the glory duck people want.
Updated .travis and setup.py to handle new version of fermipy and fermitools.

Updated required fermipy version

This version requires fermipy >= 0.17.3. This ensures that all the functionality for DM decay is present.

Support DM decay and multi-component analysis

This release include support for:

• multi-component analyses
• analysis that include DM decay spectra and spatial profiles.

Working version of analysis pipeline for dSphs

Merge pull request #4 from fermiPy/dmcat-dev

Updated fermipy dependence.

Test version of DM analysis pipeline

This is a fully working test version of the Dark Matter analysis pipeline.