Pagination should work.
SolrSearchServer is serializable now.
Merge remote-tracking branch 'wf4ever/develop' into develop

Conflicts:
	src/main/java/org/purl/wf4ever/rosrs/client/search/SearchServer.java
	src/main/java/org/purl/wf4ever/rosrs/client/search/SolrSearchServer.java
	src/main/java/org/purl/wf4ever/rosrs/client/search/SparqlSearchServer.java