Output file for kick modified

The output file 'getkick.out' from previous commit is now changed-> only
has action calculation for beta from model in old format, but with new
method of calculation for 2J.  There is now a separate output file
'getkickphase.out' with calculation of action from phase.  Action
calculation using beta from amplitude is no longer in any output files.

Additionally, comments added to gen_kick_calc().
Merge branch 'master' of https://github.com/pylhc/Beta-Beat.src