Added REadFile for reading java serialised objects from file
LIWCOnTokenDoubleValues.java - catches IllegalArgumentException from LIWC in case words have illegal characters
SelectBsonFields.java - checks for null returns from mongo, replaces with empty string and issues warning

Minor changes:
MongoDBClient.java - an extra console message
MongoDBQuery.java - added a console message
ggregateInstances.java - do not commit (only an extra println)
SaveTopicModelState.java - added extra console.fine() messages
DocumentTopicsToCSVFile.java - commented out a (presumably) unused variable

	modified:   src-analytics/org/seasr/meandre/components/analytics/mallet/AggregateInstances.java
	modified:   src-analytics/org/seasr/meandre/components/analytics/mallet/DocumentTopicsToCSVFile.java
	modified:   src-analytics/org/seasr/meandre/components/analytics/mallet/SaveTopicModelState.java
	modified:   src-analytics/org/seasr/meandre/components/analytics/psychometrics/LIWCOnTokenDoubleValues.java
	modified:   src-tools/org/seasr/meandre/components/tools/db/mongodb/MongoDBClient.java
	modified:   src-tools/org/seasr/meandre/components/tools/db/mongodb/MongoDBQuery.java
	new file:   src-tools/org/seasr/meandre/components/tools/io/ReadFile.java
	modified:   src-transform/org/seasr/meandre/components/transform/bson/SelectBsonFields.java