Add an example for extending a widget
JSHint fixes
Minor code cleanup for extend example
Minor css class naming improvement for extend example
Merge branch 'develop' into feature/issue-85-add-an-example-for-extending-a-widget
Merge branch 'develop' into feature/issue-85-add-an-example-for-extending-a-widget
Merge branch 'feature/issue-85-add-an-example-for-extending-a-widget' into develop