Improve CTA IRF and simulation classes (point-like analysis) #888
I need that for the gammapy meeting next week. I'll merge that in a bit if you are not available (all tests should work when gammapy/gammapy-extra#52 will be merged)
This PR does not change the fact that
Output example for the extrapolation of a Fermi/LAT source is shown below (~0.015 s for a simulation, it's ultra fast!).