updated AP and F10.7 values for IRI and MSIS
minor raytracing updates
added mlon
first version of Map Grid velocity plotting
Merge branch 'master' into plotmapgrd
corrected for southern hemisphere
a commented full version of map potential plotting
included Sebastien's changes/comments
Merge remote-tracking branch 'upstream/master'

merging upstream
fixing bugs in plotMapGrd.py