JPA persistence binding

Please review.
Included are libs for PostgreSQL, Apache Derby and MySQL.
Tested on PostgreSQL and Apache Derby. Working OK on my production system.

That's weird. .settings folder is empty in my copy.



> Am 05.11.2014 um 11:10 schrieb Thomas Eichstädt-Engelen <notifications@github.com>:
> 
> In bundles/action/org.openhab.action.squeezebox/.settings/org.eclipse.jdt.core.prefs:
> 
> > @@ -1,7 +0,0 @@
> > -eclipse.preferences.version=1
> > -org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
> > -org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.5
> > -org.eclipse.jdt.core.compiler.compliance=1.5
> > -org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
> > -org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
> > -org.eclipse.jdt.core.compiler.source=1.5
> 
> please revert this change since it doesn't seem to be related to this PR
> 
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