Fixes #18. First pass at amendment infrastructure.

Fixes #18. First round for implementation of amendments and migration for existing amendments.
Merge pull request #74 from broadinstitute/issue_72

Fixes #72
Merge branch 'master' into amendments_new
For #18: Add storage method for FileItems
For #18: Add font awesome fonts for spinner and file icons
For #18: BlueImp file upload scripts
For #18: BlueImp file upload scripts
For #18: License
For #18: Library configuration updates
For #18: First pass at integrating new amendment page into the IRB view.
For #18: Cleanup and ready for user testing.
Merge pull request #76 from broadinstitute/amendments_new

Amendments