Add -XstartOnFirstThread for mac - fix

This is a fix for the previous commit - that one had a conflict
which was resolved badly - it missed the empty property definition.
AbstractTreeItem is now selected before a selection check.
Fix for removing runtimes (RuntimePreferencePage)
Add license, description and copiright to feature and plugins

The RedDeer feature was lacking any kind of description or legal
information. Also, the plugins needed a definition of Bundle-Vendor
and about.html for license information.
org.jboss.reddeer.wiki.examples classpath fix
BrowserView implementation