Fixed Cancel button when opening project, Fixed 180 domain bug in auto grid,...

Fixed Cancel button when opening project, Fixed 180 domain bug in auto grid, fixed bug saving settings and updated documentation.  Fixes #998.  Fixes #1392.  Fixes #1439.  Fixes #1530.

git-svn-id: http://subversion.wr.usgs.gov/repos/prog/isis3/trunk@5189 41f8697f-d340-4b68-9986-7bafba869bb8