chore(travis): run integration tests
chore(travis): fix travis error with npm
fix: support timeout mocks on ie8

See http://www.adequatelygood.com/Replacing-setTimeout-Globally.html
for description of the problems and solutions.
Jasmine's boot.js already has this hack.

Closes #41
chore: update contributors
chore: release v0.2.3
fix: commonjs compatibility