Flask-bootstraps

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* Slight change in versioning (dot instead of hyphen for the Flask-Bootstrap
release).

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* Switched the CDN to `cdnjs <http://cdnjs.com>`_ because `netdna
<http://bootstrapcdn.com>`_ keeps changing files around too much.
* Introduced ``BOOTSTRAP_CUSTOM_CSS`` option.

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* `FontAwesome`_ now version 3.0 instead of 2.0.
* The ``navbar()``-macro is gone. It was accidentally committed and never did
anything useful, so this hopefully won't concern anyone.

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* `FontAwesome`_ is now supported
as well, can also be loaded from bootstrapCDN. Set ``BOOTSTRAP_FONTAWESOME``
to ``True`` to enable it.
* ``BOOTSTRAP_CDN_BASEURL`` is now a dictionary for multiple CDNs (i.e.
Bootstrap, FontAwesome can use different base URLs). This will break any code
that relied on setting ``BOOTSTRAP_CDN_BASEURL``.

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* There is no longer a self.app on Flask-Bootstrap. The extension can be shared
by any number of applications using ``init_app()`` (though the old
``__init__()`` signature is kept for backward compatibiliy).

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* WTForms generated HTML code is now considered safe. This allows Flask-WTF's
``RecaptchaField`` to work with ``quick_form``.