Dokang

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- Fix redirection error when uploading documentation.

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**Brown bag release.**

- Drop Python 2.6 support.

- Make documentation available from the root of Dokang ("/"). This
change is backward-incompatible.

Before this commit, if the upload dir was named "uploaded", the
documentation would be available at ``/uploaded/<doc_set_id>``. This
was a bit too verbose.

With this (backward-incompatible) change, the documentation is now
available at ``/<doc_set_id>``.

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- Add "highlight" in the query string of the URLs of search results.
This parameter is understood by Sphinx-generated HTML files.

- Add documentation uploading end point (to use Dokang web frontend to serve the documentation)

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- Fix bad-looking (but working) URLs generated in the web front-end.
They used to contain two consecutive slashes (for example
http://example.com/project//doc.html) when the configuration of the
project had a slash at the end of its URL.

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- Fixed MANIFEST.in so that the Python package contains all templates
and stylesheets required by the web front-end.

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- A new ``dokang.hit_limit`` option has been added to the INI
configuration file. It limits the number of results shown on the web
front-end (or lifts this limit if the option is absent).