Removing unused code and fixing NPE in IndividualRequestAnalysisContextImpl.java VIVO-229
various performance tweaks
Merge branch 'maint-rel-1.6' of https://github.com/vivo-project/Vitro into maint-rel-1.6

Conflicts:
	webapp/src/edu/cornell/mannlib/vitro/webapp/servlet/setup/FileGraphSetup.java
Merge remote-tracking branch 'origin/maint-rel-1.6' into develop