Fixed bug in  where UAF channel wasn't being handled properly. Cached files weren't named with the channel in them. Also added a  option so that all channels for a particular radar can be pulled at once.
Added testing for the channel option.
Fixed cached naming issue where channel is specified but only files without channel in their name are found. Cached files were erroneously named with a channel number.
Removed code that was leftover from testing.
Removed extra erroneous f.
Merge branch 'develop' into feature_allChannels
fix of logic for readScan()
reindent readScan() for pep8
make comments line up nicely
Merge pull request #93 from vtsuperdarn/feature_allChannels

Fix and feature: channel in radDataTypes.py
Merge branch 'develop' into bugfix-readScan
Merge branch 'bugfix-readScan' into music