improved description of workflow in git.txt ... part of the old description did not actually match our Github workflow, so this is now rectified
Fix some items in des module that didn't get changed as they should have as part of #365 and #380
Minor update to comment in psfex code
Merge branch 'master' into #372

Conflicts:
	galsim/base.py
Merge branch 'master' into #407
added trial drawK_Gaussian test, checking and debugging...
(#407)
made assert tests almost_equal, with decimal=15, passes
(#407)
ooops forgot to uncomment all other tests from if __main__
(#407)
added a little more dox
(#407)
added a Moffat/Exponential pixel level drawK comparison test, just checking it out...
(#407)
used matplotlib to choose good test scales dk, tests pass
(#407)
uncommented all interim testing stuff, ready to go I think
(#407)
made the drawn pixel comparisons slightly less stringent - they pass on my machine but system specific differences might alter, e.g., FFT or numerical results and 14 decimal places is still pretty good
(#407)
Modify flux to O(1) and relax test to decimal=12
(#407)
Merge pull request #410 from GalSim-developers/#407

#407 Fix drawK errors, and improve non-truncated Moffat
Merge branch 'master' into #372
Merge branch '#372' into #377