let hets return all written files.
add pp_xml_name and xml_name and set them

While parsing we set the pp_xml_name and xml_name
to avoid confusion when determining the name ourselves.
fix specs for hets-output paths.
adjust hets path for Mac OS X homebrew compliance.
Merge pull request #711 from ontohub/fix_hets_path_for_homebrew

adjust hets path for Mac OS X homebrew compliance.
Updated Ruby version to 2.1.1.
Merge pull request #712 from ontohub/ruby-2.1.1

Updated Ruby version to 2.1.1.
refactor xml-file questions for rails style.
Merge pull request #695 from ontohub/690-pp_xml_stuff

PP XML Stuff, fixes #690.
Merge branch 'staging' into develop