Fix spitzer.irac.ps units; add hst.wfc3uvis
Add hst.wfc3uvis
Fix gaussian crash.
Bugfix: observing.am_plot not respecting fig keyword
observing.Observer: add name, make date a property.
observing.am_plot: add Observer to the LST axis label.
observing: fix am_plot crash, LST label, draw plot at the end.
v2.1.11