JSCBC-121: Rename shutdown to disconnect.

Change-Id: Iea2625c4fb0877a528c42093fb12ef000c10c45c
JSCBC-222: Rename all instances of DSN to ConnStr.

Change-Id: I4cbc30edb33bfc072ebc725979ee0e46a03267b6
JSCBC-124: Implement remaining libcouchbase configuration options.

Change-Id: I81c4ed4234e6b949d92a5e8ad927a6e87fe771ba