CLC-4110 - Update Gems - Secure Headers / ngAnnotate

https://jira.ets.berkeley.edu/jira/browse/CLC-4110
Merge pull request #2824 from christianv/CLC-4110

CLC-4110 - Update Gems - Secure Headers / ngAnnotate
CLC-4070 CLC-4100 Centralize CalCentral authorization