Make _.uniq work with sorted = true and an iteratee. Fixes #1866
Merge pull request #1867 from akre54/sorted-uniq-with-iteratee

Make _.uniq work with sorted = true and an iteratee
use _.contains in _.uniq instead of indexOf
Merge pull request #1868 from akre54/uniq-contains

use _.contains in _.uniq instead of indexOf