Merge pull request #6 from sethladd/master

Fix tests for latest SDK
Moved to new library versions
Version 0.0.10+0.4.3
Added version constraint for the unittest package
Moved to the latest available dependency libraries
Updated to versions of dependencies
Tested against dart v0.4.5.1
Small changes to the README
Moved to latest library dependencies
Fixed the imports
Fixed context test regarding the mirroring of an object
fix for tests. see also http://goo.gl/iTi3Y for more info on fix