Namespacing directory generation fix

[nullset2]

See issue #379. Very quick contribution, the tests pass afaik, I used gsub on the templates because using that we'll avoid breaking the templates for un-namespaced scaffolding. I know there's probably a better way to do this but I think this is still usable though.

[rails-bot]

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[nullset2]

Hey guys, sorry about dropping off this PR a while ago, I got stuck with a lot of stuff and I'm trying to pick it up now.

The checks pass now and I think I have described the problem adequately and my approach works, however I'm willing to change stuff if you have feedback for me.

Thanks dudes.

[nullset2]

@rafaelfranca do you have any additional input for this?