Adds to image.profile latitude and longitude profile from image functions
Adds unit tests for new functions for latitude and longitude profiles in gammapy.image
Require scipy>=0.14 in rtd-pip-requirements.txt
Merge pull request #167 from ellisowen/profiles

Profiles
Fixes circular import bug with spectrum.flux_point
Implements SED from GammaSpectralCube code
Adds unit tests for SED from GammaSpectralCube code in gammapy.spectrum.sed