Merge pull request #404 from sbesson/rebased/develop/external_broken_links

Add external list of broken URLs to linkcheck_ignore (rebased onto develop)
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 380 (Removing ndpi from readers list for fs demo)
merge develop -D org -I include -E conflict -E needs-fixes -E broken: PR 390 (Add slf4j-log4j dependency in the test-suite component (rebased onto develop))
merge develop -D org -I include -E conflict -E needs-fixes -E broken: PR 392 (Logging docfix (rebased onto develop))