ant: release target archives release version metadata

tools/source-archive creates and repacks the source release,
and embeds ant and cmake version metadata in the release.
ant/version.xml conditionally includes ant/gitversion.xml,
overriding the use of git when building from a source
release.  This file will never be present in a source
repository.
cpp: cmake uses embedded version metadata
ant: release target works when run in a submodule

Check for presence of .git, not whether it's a directory.
First round of changing loci_tools to bioformats_package
Change CMake variable name
Minor change in docs of InstallWizard
merge dev_5_0 -D org -I include -E exclude: PR 889 (Logback conversion)
merge dev_5_0 -D org -I include -E exclude: PR 890 (CZI: make sure that SubBlocks are correctly initialized in openBytes)
merge dev_5_0 -D org -I include -E exclude: PR 892 (Update JPEGTurboServiceImpl.java (rebased onto dev_5_0))
merge dev_5_0 -D org -I include -E exclude: PR 894 (Make a buildable source release (5.0))