Do something tot merge text content in .properties files into xaction documentation

[GoogleCodeExporter]

Most of the xaction that ship with the bi server use property files for actual 
text content and the xactions themselves use %property syntax to refer to those 
properties. 

This means we cannot simply use xactions to generate documentation - we really 
need to grab the contents of the property file as well (and if you really want 
to be complete, do that for all localized versions of the property file).

Original issue reported on code.google.com by roland.bouman on 18 Oct 2010 at 11:42