Remove http-client from allow-newer

Now that pipes-http-1.0.2 supports http-client-0.4.x.
Download upper air soundings
Add a parser
Add handlers for UAS
Draw UAS stations
Handle click events
Add a modal for UAS
Add volare-uas directive
Draw condition curve
Adjust size
Draw grid
Add a page to show UAS chart
Draw mixing ratio
Draw an actual mixing ratio chart
Draw dry adiabat
Draw an actual dry adiabat
Show height
Take care of min pressure
Specify minimum pressure and temperature