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
Declarative for DateFields (and related) with ISO8601 (#16313)
DesignAttributeHandler supports method names that contains some words in
uppercase
DesignAttributeHandler and other components now use extensible Formatter
with Converters rather than static methods
Change-Id: I9f68414bd4821f47ff37a26375091d154cae9a93