v0.4.2

Check if Object.observe is native

v0.4.1

Merge branch 'develop'

v0.4.0

release with internal algorithm conform to proposal at the 11/14/2013

v0.3.0

release with internal algorithm conform to proposal at the 9/12/2013

v0.2.0

release with internal algorithm conform to proposal at the 01/30/2013