Extract IWidgetResizeHandle into its own file
Remove unused css file: wiring_editor.css
Improve wirecloud components showcase examples
Remove icon-close and use icon-remove
Remove config interface css rules as they are not used
New StyledElement component EditableElement
Rework iwidget interface
Rework IWidgetResizeHandle to follow Wirecloud's code style
Add copyright header to IWidgetResizeHandle.js