adding changes
Merge branch 'master' of https://github.com/bhsingh/trec

Conflicts:
	src/main/java/org/biosemantics/trec/pipe/ShortestPathImpl.java
	src/main/java/org/biosemantics/trec/report/ReportSearch.java
	src/main/java/org/biosemantics/trec/report/ReportUtility.java
	src/main/java/org/biosemantics/trec/report/TfIdfCalculator.java
	src/main/java/org/biosemantics/trec/report/TrecDatabaseUtility.java