Add Export DB Task to create sanitized export of database

Fixes #19.

Added two tasks:

SanitizeDatabase - Sanitizes an existing database
ExportDatabase - Creates a backup, sanitizes it, and exports it to Blob Storage

Note: The changes to the csdef/cscfg are because this is designed to sit on top of the v2 Ops change, and in that model, the environment settings live in the Worker Role's CSCFG.

I had to add a Service Reference to the SQL DAC WCF Service so that added a bunch of WCF Spew. Just skim by it ;)