Supporting rdf as default extension like xml
Updating getSectionPath
Merge branch 'develop' of github.com:XIMDEX/ximdex into develop

* 'develop' of github.com:XIMDEX/ximdex:
  Resolving bug. Replace templates_include of section after rename template
  Solving name fail
  Adding support for ontologies in relaxng of metadata
  New translated strings
  Solving sintax bugs
  Using service instead of model class
  Adding useful methods to get metadata options for a node
  Adding support to new table RelNodeTypeMetadata