Kotti-settings

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* Use the edit template as macro for the settings page.
* Added deform_bootstrap to requirements, fixes 4.

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* Only scan the needed views file.
* Added MANIFEST.in to get rid of the local folder.

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* Added documentation for the default schemas.
* Change the implementation to check what settings form was saved.
* Added new util method 'set_setting' where value transformations are handled.
* Removed not needed fanstatic resources.
* Changed the internal name of the forms to be more unique.
* Reinitialize chosen elements when tab is shown.
* Convert boolean to 'true' or 'false' to meet the requirements of deform's checkbox widget.

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* Added a helper method for one of the default setting schemas.
* Only save the settings from the submitted form.
* Set the saved form as the active one.
* Added possibility to remove a widget only from a specific slot.

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* Fix: Settings defined in a schema also have to be initialized.

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* Added possibility to remove a widget from the slots.
* Added two default schemas, one to select the slot for the widget and one
to set where to show the widget.