Fix imaje2 typo
Fix NPE using `apt-get install imagej`

The `/usr/bin/imagej` launcher under Ubuntu starts
ImageJ and points it at the directory `~/.imagej`
to look for plugins. The location `./plugins` doesn't
exist, and so the insight code receives a null array
of locations. This is just a workaround; perhaps later
versions can look for the `~/.imagej/plugin` directory
itself. (There may be a System property that points to
the location set via -ij_user_path)
Allow loci_tools or bioformats_package as dependencies.
Exclude B-F and logback jars.
Modify download link
Remove tabs and whitespace.
List first dependency if conjunction is OR.
Use Pillow instead of PIL

PIL is unofficially not maintained anymore and its installation via pip 1.5 or
later now requires to pass --allow-external PIL --allow-unverified PIL
The proposal of this commit is to use Pillow as a replacement.
Fix wording.
Replace PIL by Pillow in misc. logging output
Add failing test for CLI chgrp command with filesets
Partial fix for chgrp error (See #11966)
Query across groups to prevent security violation error
Do not use the user.dir property

Less disruptive change. This will probably have to be reviewed.
Fix group in CLI chgrp requests with the DoAll command
Add CLI chgrp integration test with a MIF file containing one image
Mark testFilesetAllImages() as xfail
Remove unused import.
Update copyright.
Merge remote-tracking branch 'origin/dev_5_0' into ij-insight-fixed