Add package 'ch.entwine.weblounge.common.search' to bundle exports
Reapply changes which got lost in the last merge
Add null-value checks to constructor

The class should only be instantiated with both parameters, site & search index. Otherwise NPE may occur in a later stage.
Replace javax.activation.MimeType by more friendly class javax.ws.rs.core.MediaType

Conflicts:
	modules/weblounge-bridge/src/main/java/ch/entwine/weblounge/bridge/oaipmh/AbstractWebloungeRecordHandler.java