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
ant: Add linkcheck targets
README: Document ant usage
Merge pull request #744 from rleigh-dundee/ant-build

Use ant to build sphinx docs
Removing 'only works for UNIX' comment from README
Merge pull request #747 from hflynn/readme-fix

Removing build commands 'only work for UNIX' from README
merge develop -D none -I breaking -E exclude

Repository: openmicroscopy/ome-documentation
Excluded PRs:
  # PR 754 sbesson 'Document new integration jobs' (user: sbesson)
  # PR 752 rleigh-dundee 'ant: Support API doc generation' (user: rleigh-dundee)
  # PR 745 sbesson 'OMERO.matlab improvements (rebased onto develop)' (user: sbesson)
  # PR 750 rleigh-dundee 'ant: Set SOURCE_BRANCH and OMERO_RELEASE using omero.shortversion' (user: rleigh-dundee)
  # PR 743 sbesson 'Propose redesign of OMERO and Bio-Formats 5.0 CI jobs' (exclude comment)
Already up-to-date.

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