Added the ability to force a round up or round down.  The user simply follows the round number with a '+' or a '-'.  So if the value is 102.5 and the user wants to force this round up to the nearest 10, they would use '10+' to get the returned value of 110.  The standard round to the nearest ten would round to 100.  A round down in this case using '10-' would also result in 100.  if the value was 107.5, the round down and round up results would be the same as those of the value 102.5.  I also added the ability to do no, total formula round.  The default case is to round every element to the nearest 0.1.  Before, the user could override this and round to anything using 'round(#)' where '#' is the precision they wish to round to. Now if the user uses 'round(0)', the full function round will be ignored and precision will be based on individual parameters.