Revert "Disable lint warnings"

This reverts commit ad48fe872b3d51d73d971655b8e0515db630f0ff.
Revert "Merge pull request #1 from weheartit/weheartit-update-to-1.5"

This reverts commit 87056c46ac0bb01ee2690f60d7271d6ca0236e53, reversing
changes made to d3f255498de1d2a8fa0211d6ecee02cc0bef3c47.