First pass at ROI2IMG with position information
Merge branch 'master' of github.com:talogan/ASF_MapReady
Merge branch 'master' of github.com:khogenso/ASF_MapReady
Better handling of truncated files.

If the metadata says the file should be 1000 lines but we calculate from
the file size that it looks to be only 800 lines long, change the line
count to 800 before reading in the data.