Location: only delegate to File.isHidden() on Windows

This bypasses substantial performance problems when calling isHidden()
on Mac OS X/Linux over NFS.  Fixes #6586, see #12027.
FormatReader: speed up getUsedFiles()

We can assume that each call to getSeriesUsedFiles(...) will contain an
array with no duplicates.  If there is only one series in the fileset,
then, we can speed up large filesets by removing the extra check for
duplicate files.

See #12027.
DICOM: ensure that getSeriesUsedFiles returns an array of unique paths
DICOM: fix file grouping so that path names are normalized

On Windows in particular, the list of pattern files often has extra path separator escaping, which prevents the
pattern files from being matched with the files from the directory listing.
Allow dist-matlab to run on Windows
DICOM: expand sequence reading to include known sequences

See QA 9184.
Exclude one non-sequence tag from sequence parsing
CellSens: fix off-by-ones in subresolution tile calculations
Imaris HDF: make sure that all resolutions have the same ZCT sizes

Fixes #12200.
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.
Update to native-lib-loader version 2.0.1

This version has been deployed to OSS Sonatype, and is hence available
on Maven Central. It is also a release version, which is very important
since snapshot version couplings can cause dependencies to change "out
from under" a component, resulting in irreproducible builds. Especially
for releases, we do not want any snapshot dependency couplings
(the most recent Bio-Formats 5.0.1 release POM still somehow declares a
dependency on native-lib-loader 2.0-SNAPSHOT).
Add edit_on_github links to sphinx sidebar
Make prefix work for URLs