use ruby 2.1.2 on travis

we'll be upgrading ruby version
upgrade to ruby 2.1.2
Merge pull request #95 from bitzesty/ruby-2.1.2

use ruby 2.1.2
upgrade to rails 4.1.4

- upgrade `acts-as-taggable-on`, `friendly_id`, `searchlight`
- replace (upgrade) `ci_reporter` to `ci_reporter_rspec`
- specs, controllers, search fixes
- ran migration upgrades from `acts-as-taggable-on`