Added set_away command to set the structure to away or not
Also show the structure attributes (so that we can see the "away"
status with the "show" command).
This looks like debugging output; comment it out.
Assign allvars before using it (duh!)
When printing everything ("nest.py show"), if we're showing a
temperature and we're also in "F" mode, then also print the temp in
Farenheight at the end of the line
Merge branch 'master' of github.com:lrosenstein/pynest

Merged Larry's and my solutions together for printing the F temp in
the "show" command (his detection test was better, but I liked my
output better -- always show what nest.com sends back, but optionally
show the F temp).
Don't need the regexp anymore.  Also, only print the temp in F if
we're not in Celsius mode.