Switch to Couchbase SDK 3.0.2 (#318)
Switch to Couchbase SDK 3.0.2 (#318)

Motivation
----------
We had hacked in local paths to the Couchbase SDK to use unreleased
features, but those features are now released.

Modifications
-------------
Switch to using the SDK 3.0.2 NuGet packages.

Results
-------
We're closer to a releasable package.

Closes #306
brantburnett/Linq2Couchbase,couchbaselabs/Linq2Couchbase