CLC-4520 - Update gems - bootstrap-sass

https://jira.ets.berkeley.edu/jira/browse/CLC-4520

* Variables override template at templates/project/_bootstrap-variables.sass
* Readme: Bower + Rails configuration
CLC-4520 - Update gems - minitest-reporters

https://jira.ets.berkeley.edu/jira/browse/CLC-4520

https://github.com/kern/minitest-reporters/compare/v1.0.7...v1.0.8
CLC-4520 - Update gems - rspec-collection_matchers

https://jira.ets.berkeley.edu/jira/browse/CLC-4520

https://github.com/rspec/rspec-expectations/blob/master/Changelog.md
CLC-4520 - Update gems - webmock

https://jira.ets.berkeley.edu/jira/browse/CLC-4520

Fixed support for hash_including matcher in RSpec 3
Merge pull request #3151 from christianv/CLC-4520

CLC-4520 - Update gems - webmock / minitest-reporters / bootstrap-sass / rspec-collection_matchers