new spec.client plugin
bug 418309: [Spec] Generate a document with Scout GUI Model Properties
dynamically at runtime as reference documentation or specification 
https://bugs.eclipse.org/bugs/show_bug.cgi?id=418309
Change-Id: I17997c99dbdb250b154518764c60a08ff570c007
Signed-off-by: Adrian Sacchi <adrian.sacchi@bsiag.com>