Merge pull request #22 from eujern/master

Fix Ubuntu build instructions.
fix 'groupRestResources' restriction
facets for parent resource need to be added before the resource method is constructed
trying out changing the swagger directory
mixed up the attributes of the swagger and php module
ENUNCIATE-785: correct reference to "jsonElement" in docs.xml
Merge pull request #27 from podlesh/ENUNCIATE-785

ENUNCIATE-785: correct reference to "jsonElement" in docs.xml