fix travis
cleanup gemfiles / appraisals
replace deprecated stub!
update gems
remove VERSION warning
semi-fix rails 4
fix rails 2 build
Fix regression with direct count interpolations

* Rails uses translations like "must be greater than %{count}"
* These translations accept a count but don't pluralize
* Commit 1f4bb188 (#95) introduced a regression
* These unpluralized translations would return the original key