Use ActiveSupport inflections for pluralize
Use ActiveSupport inflections for pluralize

A very restricted import of ActiveSupport that does not give us
monkeypatches, but only gives us the pluralizer.  Can be ripped out if
we use a different pluralize method if we don't have activesupport in
our dependency tree later on.

Closes #93

usetint/tint,singpolyma/tint,usetint/tint,ericroberts/tint,singpolyma/tint,singpolyma/tint,usetint/tint,ericroberts/tint,ericroberts/tint,ericroberts/tint,singpolyma/tint,usetint/tint