Remaining features for 2.3.0 release.

Added conn->server, values(), r.uuid(str)

Updated tests for 2.1. Also fixed use of use_outdated.

Fixes #99.

Detect closed connection. Fixes #98.

Update README.md

Added new terms for 1.16, bumped version to 1.16.0, added opt args to…

… table, changes, min/max.

Bumped version to 1.15.1

Added r\uuid() and a test case for geo indexes. Also added indexCreat…

…eGeo and indexCreateMultiGeo terms.

Support for r\binary and BINARY pseudo-type.

Revert "Minor efficiency improvements in Datum to JSON conversion."

This broke handling of implicit vars.

This reverts commit 5b60b48.