Moved ''getTimeStamp'' into UtilityBase class and changed use where appropriate

Also, supplied ''str'' functions for UtilityBase. This can now convert float, double, and int into strings (formerly done manually using sprintf or stringstream, mostly for timestamps). There is also a new function for directly outputting the string timestamp, i.e. ''getTimeStampStr'' (used a lot). Now, no unwanted thousand delimiter commas should show up in the timestamps anymore due to a centralized mechanism.