travis should fail on doctest failure. removed reference to dead symmetric branch
travis should fail on doctest failure. removed reference to dead symmetric branch

Icelandjack/lens,Fuuzetsu/lens,rpglover64/lens,cchalmers/lens,cdepillabout/lens,danidiaz/lens,ddssff/lens,omefire/lens,hvr/lens,hvr/lens,timjb/lens,Gabriel439/lens