D-Net

added xslt join function

deprecated custom use of Caches, we should stick instead on the caching mechanism provided by spring

copies the ns prefix as well

copies also the namespaces of the splitting element

better logging

Added test for the creation of an IterableXMLParser from a gzipped file

Updated the URIresolver class
This class contains the login enabling imports of peer external resources for the current xslt (<xsl:import>)
Its method resolve() first looks for the resource within the file system; if this fails, it looks in the classpath.