MIAS: fix a few bugs in the getRequiredDirectories implementation
merge develop -D org -I include -E conflict -E needs-fixes -E broken: PR 342 (setId performance improvements)
merge develop -D org -I include -E conflict -E needs-fixes -E broken: PR 351 (Add SPW support to FakeReader)
merge develop -D org -I include -E conflict -E needs-fixes -E broken: PR 374 (Add method to retrieve the significant directory count)
merge develop -D org -I include -E conflict -E needs-fixes -E broken: PR 375 (Fix tile size retrieval for Flex)