CLC-4538 - Update gems - ngannotate-rails

https://jira.ets.berkeley.edu/jira/browse/CLC-4538
CLC-4538 - Update gems - autoprefixer-rails

https://jira.ets.berkeley.edu/jira/browse/CLC-4538
CLC-4538 - Update gems - angular-gem

https://jira.ets.berkeley.edu/jira/browse/CLC-4538
Merge pull request #3167 from christianv/CLC-4538

CLC-4538 - Update gems - angular-gem / autoprefixer-rails / ngannotate-rails