Add --ignore flag

[knownasilya]

For ignoring folders like 'models' or 'mixins'.

ember g podify --ignore models mixins

[trabus]

Absolutely.

[trabus]

So the way the option parsing in nopt works, you will have to pass multiple --ignore options one at a time:
ember podify -i model -i controller
would result in
ignored: [ 'model', 'controller' ]