CLC-4444 - Update Gems - sass-rails

https://jira.ets.berkeley.edu/jira/browse/CLC-4444
CLC-4444 - Update Gems - net-ldap

https://jira.ets.berkeley.edu/jira/browse/CLC-4444
https://github.com/ruby-ldap/ruby-net-ldap/blob/master/History.rdoc#netldap-090
CLC-4444 - Update Gems - bootstrap-sass

https://jira.ets.berkeley.edu/jira/browse/CLC-4444

https://github.com/twbs/bootstrap-sass/blob/master/CHANGELOG.md
CLC-4444 - Update Gems - omniauth-cas

https://jira.ets.berkeley.edu/jira/browse/CLC-4444

https://github.com/dlindahl/omniauth-cas/compare/v1.0.1...v1.1.0
CLC-4444 - Update Gems - rspec-its

https://jira.ets.berkeley.edu/jira/browse/CLC-4444

https://github.com/rspec/rspec-its/blob/master/Changelog.md#110--2014-04-13
Merge pull request #3105 from christianv/CLC-4444

CLC-4444 - Update Gems - rspec-its / omniauth-cas / bootstrap-sass / net-ldap / sass-rails
Merge pull request #3106 from raydavis/raywip

CLC-4443 Disable static assets serving on production since Apache httpd handles them
CLC-4443 DRY the static assets setting