added FHD_prep. testing with Ian
works with FHD. corrected a bug that made all files have the same phase center. epoch is now set to phase location
adding better coordinate support to imstats
Merge branch 'master' of github.com:dannyjacobs/capo

Conflicts:
	dcj/scripts/imstats.py
    Resolved benignly
Merge branch 'master' of github.com:dannyjacobs/capo
Merge branch 'master' of github.com:dannyjacobs/capo

Conflicts:
	dcj/scripts/FHD_prep.py
Merge branch 'master' of github.com:dannyjacobs/capo
Merge branch 'master' of github.com:dannyjacobs/capo
Merge branch 'master' of github.com:dannyjacobs/capo
Merge branch 'master' of github.com:dannyjacobs/capo
adding a redundant version of the xtalk plotter