Use shouldThrow helper for test asserts
Move away from should asserts to internal

This is needed as neither Sinon nor Chai support in-browser testing under IE.
Fix tokenizer tests under IE
Concat tests together for inbrowser exec
Add sauce labs testing support
Add selenium badge
(Attempt to) Limit sauce tests to one travis build
Create matrix target for 0.10 only
Optimize travis build with publish option
Add travis build caching
Hide success messages when running in sauce

This should help debug the firefox issues that only occur when executing against sauce.
Skip leak check under FF
Merge pull request #681 from wycats/sauce-tests

Adds in-browser testing and Saucelabs CI