Moved spring-vaadin-stuff/sidebar to it's own artifact
Added <packaging>jar</packaging>
Correct indent to spaces size (4)
Moved spring-vaadin-stuff/i18n to it's own artifact
Added implementation notice from spring-vaadin-stuff to README of sidebar and i18n
Updated reference of spring-vaadin-stuff => spring-vaadin-sidebar
Updated Java references org.vaadin.spring.stuff.sidebar => org.vaadin.spring.sidebar
Removed module spring-vaadin-stuff
Set correct name of artifact to Vaadin4Spring I18n
Set correct name of artifact to Vaadin4Spring Sidebar