fixes new feature for > 1.8 go versions

Merge pull request DATA-DOG#68 from DATA-DOG/go1.8

Support for go 1.8 SQL features

closes DATA-DOG#50

Merge pull request DATA-DOG#39 from jamiecuthill/master

Trigger expectations met when query and args matched

change package url for README consistency with example, closes DATA-D…

…OG#34

add a test for slice argument matching

Merge pull request DATA-DOG#32 from DATA-DOG/natural-argument-converters

Natural argument converters

concurrency support and other known issues

maintenance release

Initial stability tag