Add wsgi.py for OMERO.web

Since Django 1.4 the wsgi.py has been included in all new Django
projects to ease integration with WSGI aware web servers.  Adding this
allows the alternative ways of deploying OMERO.web such as:
 * Gunicorn (http://gunicorn.org/)
 * uWSGI (http://uwsgi-docs.readthedocs.org/en/latest/)

As well as many others.  Static content serving is also supported in
multi-process mode with automatic restarts after changes.
build: release-docs: Use ant to build sphinx documentation
Merge pull request #2352 from chris-allan/omeroweb-wsgi

OMERO.web WSGI additions
Update dev_5_0 submodules

Repository: openmicroscopy/openmicroscopy
Already up-to-date.

Repository: openmicroscopy/bioformats
Already up-to-date.

Repository: ome/scripts
Already up-to-date.

Repository: openmicroscopy/ome-documentation
Updating 49cff36..036c324
Merged PRs (fast-forward):
  # PR 751 rleigh-dundee 'ant: Set SOURCE_BRANCH and OMERO_RELEASE using omero.shortversion'
  # PR 748 hflynn 'Removing build commands 'only work for UNIX' from README (rebased onto dev_5_0)'
  # PR 746 hflynn 'Use ant to build sphinx docs (rebased onto dev_5_0)'

Generated by OMERO-5.0-latest-submods#376 (http://ci.openmicroscopy.org/job/OMERO-5.0-latest-submods/376/)
Merge pull request #2345 from snoopycrimecop/merge/dev_5_0/submodules

Update dev_5_0 submodules
Merge pull request #2342 from rleigh-dundee/ant-sphinx-dev50

build: release-docs: Use ant to build sphinx documentation