Travis: Install pep257.
Travis: Install pep257.

cmusatyalab/openface,xinfang/face-recognize,nmabhi/Webface,cmusatyalab/openface,xinfang/face-recognize,xinfang/face-recognize,Alexx-G/openface,nhzandi/openface,francisleunggie/openface,cmusatyalab/openface,nhzandi/openface,Alexx-G/openface,Alexx-G/openface,nmabhi/Webface,Alexx-G/openface,nmabhi/Webface,nmabhi/Webface,francisleunggie/openface,nhzandi/openface,francisleunggie/openface