Add boost include directories, use static boost on Windows.
Add boost include directories, use static boost on Windows.

Also, define _UNICODE for code referencing the mongo client
lib since the super build builds the lib with _UNICODE.

Change-Id: I7ae81a87bcd6b8903127d243d4e7776aefaec659

OpenChemistry/mongochem,OpenChemistry/mongochem,OpenChemistry/mongochem