Build: Update to gwt 2.5.1

	* pom.xml: Update the gwt and gwt-maven-plugin to 2.5.1.
Build: Eclipse file updates done by Eclipse.

* .classpath:
* settings/com.google.gwt.eclipse.core.prefs:
Eclipse Quick Fix changes apparently to make these
up to date for the latest maven eclipse plugin.
Stop using a ChangeLog
Another Eclipse files Quick Fix

* .settings/com.google.gdt.eclipse.core.prefs:
Eclipse suggested and did this change.
Fix minor comment typos