Remove JENKINS_JOB variable and point at the release components
Add extlink for source directories and fix links across doc
Miscellaneous redirects
Redirect svn.openmicroscopy.org.uk links
Redirect http://loci.wisc.edu/software links
Deprecate download_components in favor of downloads extlink
Point at other artifacts  directly using the downloads extlink
Remove reference to bfcppdoxygen API

Ideally we should be able to integrate Doxygen documentation generation
deployment as part of the release workflow.
Revert "Remove reference to bfcppdoxygen API"

This reverts commit 50cc72214c9ed93cecab8aa438703865ceb01354.
Add extlink to doxygen documentation to appear under download.oo.org
Merge pull request #1110 from sbesson/rebased/develop/jenkins_docs_cleanup

BF docs: Jenkins cleanup (rebased onto develop)