Add basic .gitignore file.
Merge pull request #146 from ninneman/devel

Add basic .gitignore file.
Updated the version history to 3.2.1
Merge branch 'devel' of https://github.com/asfadmin/ASF_MapReady into devel
Merge branch 'devel'
Merge branch 'master' of https://github.com/asfadmin/ASF_MapReady