Implement a extension API#258

Merged

arunoda merged 7 commits intomasterfrom

Jun 20, 2016

Commits on Jun 16, 2016

Implement the new addon API.
arunoda
committed

Commits on Jun 17, 2016

Tested addon and decorator API with a real app.
arunoda
committed

Commits on Jun 19, 2016

Commits on Jun 20, 2016