CLC-4523 - Update gem - sass-rails

https://jira.ets.berkeley.edu/jira/browse/CLC-4523
Merge pull request #3153 from christianv/CLC-4523

CLC-4523 - Update gem - sass-rails
CLC-4524 - Bye Compass, Welcome Autoprefixer! - Update Gemfile

https://jira.ets.berkeley.edu/jira/browse/CLC-4524
CLC-4524 - Bye Compass, Welcome Autoprefixer! - Update SCSS Lint

https://jira.ets.berkeley.edu/jira/browse/CLC-4524
CLC-4524 - Bye Compass, Welcome Autoprefixer! - Add config file

https://jira.ets.berkeley.edu/jira/browse/CLC-4524
CLC-4524 - Bye Compass, Welcome Autoprefixer! - Update CSS files

https://jira.ets.berkeley.edu/jira/browse/CLC-4524
Merge pull request #3154 from christianv/CLC-4524

CLC-4524 - Bye Compass, Welcome Autoprefixer!
CLC-3862 Support multiple Tele-BEARS terms in My Academics
We currently only ask BearFacts-API for Tele-BEARS appointments in the "Future Term". However, from early June until the following January, BearFacts systems consider Fall the "Current Term". During the summer, this means that legitimate Fall appointments will be lost.
This change will also check the "Current Term" when that term is actually in the future.
CLC-3862 Add version of strptime with Rails timezone support
Needed to deal safely with Telebears parsing on servers which we don't control (e.g., Travis-CI)