Activated namespace comprehension for all `XercesDOMParser` instances
* this is possibly a breaking change for all applications built on either `FunctionExternalCommand` or `FunctionReadFile`
** e.g. meta datasource XPath queries in _StaticXSLT_ will have to be changed to accomodate this
* the reason for doing this was to fix the behaviour when reading namespaced XML files
** e.g. XSL stylesheets could only be queried with a clunky XPath expression such as `$transformation/self::*[name() = 'xsl:stylesheet']` instead of simply `$transformation/self::xsl:stylesheet`
*** this was caused by the now activated namespace comprehension in `xercesc::XercesDOMParser` which is disabled by default
*** it caused all local node names to be converted into their namespace prefixed version, e.g. `local-name()` returned `xsl:stylesheet` instead of `stylesheet`