Fixed bug causing coord_conv to fail when fed mxn array where m != 1.
Simplified code for dealing with nxm arrays and added testing for that case.
Merge pull request #90 from vtsuperdarn/hotfix-coord_conv-array

Fixed bug causing coord_conv to fail when fed mxn array where m != 1.
Merge branch 'develop' into bugfix-rti-fov