Fix Javadoc warnings under forks
Fix Javadocs warnings under formats-bsd
Fix Javadocs warnings under formats-gpl
Fix remaining Javadocs warnings
Fix warning in CellVoyagerReader
Add missing packages for Javadocs target
Add option to fail Javadocs on warnings
Fix location of specification sources
Fix Javadocs warnings under specification
Merge remote-tracking branch 'origin/develop' into javadocs_warnings

Conflicts:
	components/formats-gpl/src/loci/formats/in/HRDGDFReader.java
	components/formats-gpl/src/loci/formats/in/PovrayReader.java
	components/formats-gpl/src/loci/formats/services/WlzService.java
Changed ND2 metadata string handling to work properly with empty strings
Add support for more metadata.
Merge pull request #1467 from rleigh-dundee/cmake-xerces

cmake: Replace FindXerces with FindXercesC
Merge pull request #1469 from rleigh-dundee/cpp-pixelprop-warnings

cpp: bioformats: Correct placement of warning pragmas in PixelProperties
Merge pull request #1468 from rleigh-dundee/cpp-showinf-fixes

C++: binary build and showinf fixes
cpp: compat: Add boolean type
cpp: bioformats: Work around doxygen doc warnings

Some inline template methods are marked as undocumented even when the
prototype is fully documented.  And this is not even consistent for
all the methods of this type.  This just removes warnings for some
doxygen versions.
cpp: xerces: Minor whitespace fix in EntityResolver
Enter correct value.
Merge pull request #1457 from melissalinkert/im3

IM3: fix memoization and whitespace