Editing date and timestamp values

[ryan-kipawa]

Users should be able to work with date and datetime objects via python datetime objects. For example, when modifying msm_Project.ComputationBegin, passing a datetime object does not work. Additionally, it provides no error to the user for extra guidance.

Something similar to what is done on MIKE IO 1D could be a solution, where datetime objects are converted into their corresponding .NET objects.