Update __init__.py

[rrwt]

Edited to add datetime to init. This will help us with module discovery

[jkimbo]

@rrwt the Date, DateTime and Time objects are already exported here directly. Why do you need the datetime module as well?

[rrwt]

@jkimbo Thank you. I didn't see that it has been fixed for the latest version. Just checked and my org is using a different version.