Merge pull request #3 from ahawkins/readme-fixes

Bump version

Circuit respects failure_threshold

Fix terminology in readme

Fix gemspec

More descriptive error message

Argument is not used

Circuit#name

Move default setup into Repo

TestCases only use public interface

Small fixes to make tests more portable

Extract test cases to module

Set repo to in memory by default

First crack at a readme

Check query methods are mutually exclusive