Revert "Fix how to do defaults in app.go"
Revert "Fix how to do defaults in app.go"

This reverts commit 8906567dc2ad52fd31c50cf02fa606505a1323ba.

urfave/cli,phinnaeus/cli,phinnaeus/cli,codegangsta/cli,phinnaeus/cli,codegangsta/cli,urfave/cli