Fix null pointer exception if a title has no publication date.
Merge branch '2013.06.0-Nashville' into 2014.01.0-recordgrouping

Conflicts:
	vufind/import/Reindexer.jar
Availability Fixes
- Reindexing fixes to deal with barcodes that have extra spaces in Sierra
- When exporting available barcodes, ignore blank ones
Merge branch '2013.06.4' into 2014.01.0-recordgrouping

Conflicts:
	vufind/import/Reindexer.jar
	vufind/import/src/org/vufind/MarcProcessor.java
	vufind/sierra_export/sierra_export.jar
Availability fix from 2013.06.4 for Record Grouping