Metamorph: be less aggressive about closing readers right away

If the last plane has been read, or more than 128 readers are open, then
we can close the reader; otherwise, keep it open to prevent
reinitializing a reader on every openBytes call.

Fixes #11968.
Merge pull request #1084 from rleigh-dundee/make-props-dev50

make: Convert variables to ant properties
Merge pull request #1086 from melissalinkert/ticket-12218

QuickTime: fix header/footer parsing bug
Merge pull request #1085 from melissalinkert/nd2-line-scan

Fix single plane ND2 line scan
Merge pull request #1081 from melissalinkert/disable-group-files

Disable file grouping in ImageJ remote import plugin
merge dev_5_0 -D org: PR 1018 (Flex: fix support for new file naming scheme)
merge dev_5_0 -D org: PR 1078 (Lots of Zeiss CZI fixes)
merge dev_5_0 -D org: PR 1080 (Exclude log4j and packages from target-test-runner)
merge dev_5_0 -D org: PR 1087 (Metamorph .nd performance improvements)
merge dev_5_0 -D org

Repository: openmicroscopy/bioformats
Already up-to-date.

Merged PRs:
  # PR 1018 melissalinkert 'Flex: fix support for new file naming scheme'
  # PR 1078 melissalinkert 'Lots of Zeiss CZI fixes'
  # PR 1080 melissalinkert 'Exclude log4j and packages from target-test-runner'
  # PR 1087 melissalinkert 'Metamorph .nd performance improvements'

Generated by BIOFORMATS-5.0-merge-daily#820 (http://ci.openmicroscopy.org/job/BIOFORMATS-5.0-merge-daily/820/)