Move and rename server classes which go into the compatibility package
* Use com.vaadin.v7
* Use the same class name as in Vaadin 7
* Use a "vaadin7-" declarative prefix for Vaadin 7 components
Change-Id: I19a27f3835b18980b91a4f8f9464b2adde1a5fd5
- Changes input prompt to be based on the placeholder attribute.
- Unifies TextChangeEvents with ValueChangeEvents.
- add*Listener methods now return Registration objects, remove*Listener methods removed.
Change-Id: Ie92506ae9db205bb0010ae9126c608c62ad023ff