Flask-boost

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* Create js & less file when create action with template.
* Do not create action when create controller.
* Refactor codes.

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* Quit if controller file does't exist when new action.
* Mkdir if controller template dir not exist when new action.
* Fix typo.

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* Add generate action command.
* Change command ``generate`` to ``new``
* Add generate action command.
* Add clearfix style to form-group.
* Indent html files with 4 spaces.
* Update doc.

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* Fix a bug when generate template file.

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* Generate template file when generate controller.
* Fix a route bug in controller template.
* Clean codes.

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* Use ``UglifyJS`` to compile js codes.