ImageJ: disable file grouping when not reading from the filesystem

In particular, this disables grouping when reading over HTTP, as that is
at best extremely slow.

Fixes #12158.
target-test-runner: exclude package and log4j jars

Fixes #12114.
docs: Drop XML_SCHEMA and XML_DTD
cpp: ome-compat: Document boost::filesystem fallbacks
Adding community outreach to main index
Updating bug reporting page
Users - OMERO & comlinetools updates
JM's suggested rewording
Add failing tests to TestBfGetPlane

The input checking logic in bfGetPlane had a bug where x and y were both
tested against the same dimension. This commit should add failing tests for
this issue.
Fix input check validation in  bfGetPlane
Updating Leica LAS AF Lite link
Merge pull request #1126 from hflynn/rebased/develop/leica-link

Leica link (rebased onto develop)
Merge pull request #1117 from rleigh-dundee/cpp-doxygen

cpp: Minor doxygen fixes
Merge pull request #1121 from sbesson/rebased/develop/bfgetplane_fix

Fix bfGetPlane tile input check (rebased onto develop)
Merge pull request #1107 from melissalinkert/rebased/develop/test-runner-classpath

Exclude log4j and packages from target-test-runner (rebased onto develop)
Merge pull request #1099 from melissalinkert/rebased/develop/disable-group-files

Disable file grouping in ImageJ remote import plugin (rebased onto develop)
Merge pull request #1119 from hflynn/rebased/develop/docs-tidy

User docs tidying (rebased onto develop)