Tweaks to AlleleIndexer.
Merge branch 'master' into mattflax

Conflicts:
	src/main/java/uk/ac/ebi/phenotype/solr/indexer/AlleleIndexer.java
Merge branch 'master' into mattflax
Initial work on MP Indexer.
Merge branch 'master' into mattflax
Merge remote-tracking branch 'upstream/master' into mattflax
First pass at MP Indexer
NPE fixes.