For methods which take in an ID (type Long) as a parameter, a check is now performed to see if they are null or not. if they are null then an exception is thrown
new methods calculateTotalNumberOfUsers getSessionIdsFromContent getNumberOfUsersInSession Which is used to generate the statistics in the monitoring environment
all utility functions are now in the one class NbWebUtil instead of having a separate util class for each environmnent (authoring monitoring and learner)
new bean property which returns a map. map contains request parameter names and values, which is populated in EditActivity action. This is used to generate the link for the authoring url (when user clicks on edit button)
