ant: Add ant build logic for sphinx documentation
travis: Use ant to build documentation
travis: Install ant-contrib
travis: Install ant-optional
ant: Move taskdef to rules.xml
travis: Explicitly set CLASSPATH
merge develop -D org: PR 744 (Use ant to build sphinx docs)
merge develop -D org

Repository: openmicroscopy/ome-documentation
Excluded PRs:
  # PR 743 sbesson 'Propose redesign of OMERO and Bio-Formats 5.0 CI jobs' (exclude comment)
Already up-to-date.

Merged PRs:
  # PR 744 rleigh-dundee 'Use ant to build sphinx docs'

Generated by OMERO-5.1-merge-push#163 (http://ci.openmicroscopy.org/job/OMERO-5.1-merge-push/163/)