Add Ruby 2.1.0 testing in TravisCI
Add Ruby 2.1.0 testing in TravisCI

We've technically supported this for a while, but let's make it
official.

Change-Id: Iee4191deca9b2677d5116374581f63cd53a32ec5
Reviewed-on: http://gerrit.causes.com/36032
Tested-by: jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@causes.com>
Reviewed-by: Shane da Silva <6f6e68d1df92f30cb4b3ce35260ddf94a402f33d@causes.com>

cih/scss-lint,gajus/scss-lint,ivantsepp/scss-lint,golmansax/scss-lint,teoljungberg/scss-lint,gatero/scss-lint,philipgiuliani/scss-lint,dwayhs/scss-lint,leseulsteve/scss-lint,davecarter/scss-lint,chatzipan/scss-lint,ingdir/scss-lint,bkeepers/scss-lint,baileyparker/scss-lint