Switch from net.imagej:ij to gov.nih.imagej:imagej

This prevents an indirect dependency on maven.imagej.net.
merge develop -D org -I include -E exclude: PR 528 (Tile performance improvements for VMS and NDPI)
merge develop -D org -I include -E exclude: PR 836 (Update JPEGTurboServiceImpl.java)
merge develop -D org -I include -E exclude: PR 857 (Initial support for Zeiss .lms files)
merge develop -D org -I include -E exclude: PR 858 (Initial support for Veeco AFM data)
merge develop -D org -I include -E exclude: PR 859 (Assorted metadata/tile parsing fixes)
merge develop -D org -I include -E exclude: PR 866 (Update POMs to point to mirror of the cppwrap plugin (rebased onto develop))
merge develop -D org -I include -E exclude: PR 883 (Switch from net.imagej:ij to gov.nih.imagej:imagej (rebased onto develop))