Fix color map for radar.
Merge remote-tracking branch 'avian2/versioned-radar-images'

Conflicts:
	arsoapi/models.py
Add KML expiration.
Fix wrong image display.
Fix: don't expire immediately, but 5 min in future.
Use Sqlite instead of Postgre
Disable Aladin.
Merge remote-tracking branch 'zejn/master'
Add SIRAD_SI1SI2_C format.
Skip test if datafile not available.
Merge branch 'fix-color-scheme-2'