Lyra flare detection

Hi all,
Here is a PR for the LYRA flare detection algorithm I've developed for the LYRA instrument team.  It would great to have it sunpy so that people beyond just the LYRA instrument team can use it.  Let me know of any comments.
Cheers,
Danny
This fails in 2.6, right?  I'm fine with it, but just to be sure that's what we want.  I'm planing to get rid of all 2.6 madness anyway before our 0.6