[2495] avoid trying to import directories to omnivore
[2608] include valid timespan in Tarmed exclusions
Manually resolved:
	ch.elexis.base.ch.arzttarife.test/TarmedRefDataImporterPluginTest.launch
[3162] updated eal for use with rdus, updated eal optifier for 2015
[3162] fixed additional excel delimiter of codes