[TASK] Configure Travis for better build performance

* set sudo: false to allow usage of their new container-based infrastructure
* enable bundler caching
Fix bug where auto_correct Rake tasks does not take in the options specified in its parent task
Merge pull request #1508 from rrosenblum/auto_correct_options

Fix bug where auto_correct Rake tasks does not take in the options specified in its parent task
Merge pull request #1524 from braingourmets/task/travis-performance

[TASK] Configure Travis for better build performance