Dataflake-docbuilder

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- switched documentation to point to the new Git repository
- use new bootstrap.py script

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- Add a flag ``-m``/``--max-tags`` to set the number of package
versions (tags) to be shown on the generated main page. If more
tags exist, a link to a separate page is provided that shows all
versions.

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- Catch additional errors upon building
- Ignoring empty tag lists when asking Git for tags

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- Be more resilient when simple ReST text compilation or
Sphinx building fails. Now the whole documentation build
process won't just fail at that point.
- provide more meaningful log messages when running with
the ``-v`` option.

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- Now you can use ``Git`` alongside ``Mercurial`` and
``Subversion`` to use as version control system.

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- Taking more control of logging by defining our own logger and
suppressing standard Sphinx log output. The new script flag
``-v`` or ``--verbose`` enables the user to determine what to
show. Without it, only serious warnings are shown. With ``-v``
specified once you will see script progress output and notes
about Sphinx build warnings. With ``-vv`` all Sphinx output
is shown as well.