Fix path test cases

First, expect.js has no check .to.be.false,
second, all expect.js asserts are functions which need to be called.
Pass this to original handler in log
Merge pull request #119 from SLaks/fix-event-raising

Pass this to original event handler in racer log
Fixes #240
Merge pull request #103 from adrianlang/patch-1

Fix path test cases
Merge branch 'master' of git://github.com/codeparty/racer
Report errors from store fetches and queries

Fixes #68 for both subscribe() and fetch()