Default action support

I finally don't work on this system. The new stuff is this:

*0.0.5 - Alpha 5*
* Add new command `automatic` to let clean-bower-installer automatically select between update or install action to ask bower to do.
* Now the API commands `automatically`, `install` and `update` no more return a output but execute the `run` command automatically.
* Now you can specify extension(s) to ignore when you call the `min` option.

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Default action support was moved to version 0.0.6