bassically used the deposit window and corrseponding con methods, then
added some con methods based upon old con methods to make sure all the
correct things wuld be happening, did some refactoring of all the
variable names accordingly, both in the con methods that where added and
in the IncreaseDueActivity class. it now works however it does not give
an error to the user if the date is incorrect, something that quite
obviously needs to be added....