#150 Add PyIMAPIAdviseSink Interface and related methods.

[Nick Czeczulin]

This patch builds on the existing work previously done for the IMAPIAdviseSink gateway.

It uses HrAllocAdviseSink to expose a custom class that mimics its signature. So from python, you get all of the simplicity without the headaches (hopefully.)

Also adds:

• PyIMsgStore::Advise
• PyIMsgStore::Unadvise
• HrThisThreadAdviseSink
• HrDispatchNotifications
• Related constants to the mapi module

Fixes:

• Py_BuildValue errors for returned entryids (s# vs y#)
• What seems to be (during testing) a required null check before calling into PyMAPIObject_FromSPropTagArray

[Mark Hammond]

Thanks! 4384:d932f03be686