smrtClass: Manage objects with variables of strict types

This class can manage objects with variables of strict types.

It can dynamically add variables and set them to be of just one type, so when the variable is assigned to a value that is not of the defined type, it will throw an exception.

The class supports values of type integer, boolean, string, object, array, date, time, email and URL. Additionally it can validate text values with regular expressions.