Merge pull request #3 from asfadmin/seasat_devel

Seasat devel
Added seasat support to asf_import and asf_view.
Merge branch 'seasat' of github.com:khogenso/ASF_MapReady into seasat
Added Seasat support to mapready GUI, asf_mapready
Adding back in the -1000m slant shift. Fix the azimuth doppler in the xml.
Need to the use the system's libjpeg in the GUI to avoid conflict.
Fix for the erroneous times in the state vectors.
Do not include the change for the azimuth doppler, not used.
Add the slant shift to the XML metadata
Moving libsgp4
Moving to libsgp4, this time to the right spot.
Removing libsgp4 from roi2img
Makefile changes to support moving libsgp4
Removing unneeded tool
Merge branch 'seasat' of https://github.com/rudigens/ASF_MapReady into seasat_devel
Adding in generation of geotiffs
Merge pull request #4 from asfadmin/seasat_devel

Seasat devel