Changes for SolrCloud implementation.
Collections-handling via ACT.
Added some logging for debug purposes.
Merge branch 'master' into solr-cloud-merge

Conflicts:
	warc-hadoop-indexer/src/main/java/uk/bl/wa/hadoop/indexer/WARCIndexerMapper.java
	warc-hadoop-indexer/src/main/java/uk/bl/wa/hadoop/indexer/WARCIndexerReducer.java
	warc-hadoop-indexer/src/main/resources/reference.conf
	warc-indexer/src/main/java/uk/bl/wa/indexer/WARCIndexer.java
	warc-indexer/src/main/java/uk/bl/wa/util/solr/SolrFields.java
Fixed formatting.
Removed duplicate code.