#527 isValidDate/time extension to the .DateTime class

[Staffan Tylen]

There are currently no methods available that let the programmer check whether a string is a valid date or time. This proposal is for two new methods to be added to the .DateTime class that both take a string as input and return an indicator whether the string is valid or not. The response would probably be .TRUE or .FALSE. An optional 2nd parameter could also be used to pass back the format of the input string if found valid, e.g. NORMAL, STANDARD, FULL, etc.