Includes:
* Change Precise to Trusty
* Add the new plugin phase
* Remove deprecated config options
* much, much more
Change-Id: I0385f18a3256ad37a611e505e49572f27b3bcc10
The hand-maintained static HTML docs for DevStack have been in a
GitHub gh-pages branch; move them into the master branch in
preparation for hosting them in openstack.org infrastructure.
By default tools/build_docs.sh now builds the static HTML output
into docs/html.
Change-Id: Ide5f7d980a294c7a9f8a3decaed0939f1c239934