added GPL v3 license.

Drupal requires GPL v2 or later.
Merge pull request #2 from stopfstedt/license

added GPL v3 license.
updated readme
Merge branch 'master' of https://github.com/ucsf-drupal/ucsf_install
cleaned up gitignore file

removed duplicate entries
remove entries that didnt make sense
added vim swap/temp files
Merge pull request #3 from stopfstedt/gitignore_cleanup

cleaned up gitignore file