Clean up gemspec
Clean up gemspec

Align and reorder some fields to make it easier to read.

Change-Id: I9241ac257e205178c555558c6a1e23459c9fcd10
Reviewed-on: http://gerrit.causes.com/36107
Tested-by: jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@causes.com>
Reviewed-by: Shane da Silva <6f6e68d1df92f30cb4b3ce35260ddf94a402f33d@causes.com>

artemartemov/scss-lint-hdm