Ignore namespaces when filling in an XMLAnnotation's Value

This prevents the xmlns on Value from being set to an empty string.
MRC: fix handling of mode 16 data

Mode 16 denotes 8-bit RGB data, not 16-bit data.  See
https://trello.com/c/guQdSW8V/235-follow-ups-with-joaquin
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.
cmake: Add extra libtiff compatibility checks
cpp: ome-internal: Add config.h with libtiff compatibility defines
cpp: bioformats: Add TIFF I/O via libtiff wrapper
cpp: Use "stdarg.h" fallback if <cstdarg> is not functional
cpp: tiff: Add pre-C++11 workarounds and fixes
cmake: Allow compiler standard setting to be disabled
cpp: tiff: Remove redundant partial template specialisation declarations

Also remove default get/set implementation template and add
UInt16Tag1 specialisation.
cmake: Add libtiff FieldInfo checks

This was added in libtiff 4.0.3, so 4.0.2 and earlier need to work
without it.
cpp: tiff: Field can cope with FieldInfo being unavailable

This information is needed however, so the code will also need
adjusting to cope.
cpp: tiff: Cope with FieldInfo being unavailable

Hardcode known behaviour, primarily passcount, readcount and
writecount values, and disable checking that the FieldInfo
matches the get/set operations.