Merged master with smanousopoulos/master
Minor re-arrangement at inspire_vocabularies module (added reference metadata). Fixed #31.
Renamed keys/functions for INSPIRE vocabulares (names vs titles). Added a simple factory for a Thesaurus object.
Fixed typo
Merged with smanousopoulos/master. The XML serialization for INSPIRE metadata is moved to a dedicated serializer.
modified from_xml to read thesaurus title in the form title, version