Kotti-tinymce

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- Revise templates to use Bootstrap 3.
THIS IS NOT BACKWARD COMPATIBLE AND WILL BREAK KOTTI < 0.10!

- Bundle our own TinyMCE instead of relying on ``js.tinymce``. This allows
full control over the plugins.

- Publish ``kotti-tinymce`` as Bower package. This is especially useful if
you are developing a Kotti application and want to have full control over
your static assets instead of relying on (often outdated or incomplete)
``js.whatever`` packages. It also make upgrade much easier.

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- Added abiltiy to add alt text to images via kottiimage plugin.

- Use the new ``kotti_context_url`` JS global variable (introduced in
Kotti 0.10) if it is available.

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- Fix broken source code editing.

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- Fix link for PyPI - the old one 404's. (ddimmich)

- Fix German and French translations that got marked as fuzzy. (ferewuz)

- Update German translations, some translations got lost before. (ferewuz)

- Move language code translations to kotti_tinymce and initialize all
languages that are present in deform. (ferewuz)

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- Fix packaging.

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- Add CodeMirror plugin to regain source editing feature.