Fix color map for radar.
Add map align helper KML at radar.kml?align=1
Show alignment map in higher resolution.
Add radar image format version detection.
Process radar image according to detected format.

Note: adds "format_id" integer field to RadarPadavin model.
Skip aladin test if data files missing.
Add test for filter_radar()
Always add background color as 0 mmph.
Use GCP parameters from RadarImageFormat object.
Merge remote-tracking branch 'avian2/versioned-radar-images'

Conflicts:
	arsoapi/models.py