Remove bioformats_package.jar from the bftools.files

This should fix the two JARs zipped in bftools.zip
RAIS: fix Kryo serialization and setLength behavior

This is critical for big image (and slow setId) support.  See #12001.
Fix small discrepancies in I/O introduced during component migration
Merge pull request #922 from sbesson/bftoolsfix

Remove bioformats_package.jar from the bftools.files
Merge pull request #924 from melissalinkert/emergency-io-fixes

I/O fixes for ticket #12001
Update version numbers to 5.0.0-rc4
Merge pull request #925 from melissalinkert/rc4-version

Update version numbers to 5.0.0-rc4