new directory test, script for testing http://rdf-vocabulary.ddialliance.org/discovery

The directory test is home for files for testing purposes.
The script test_rdf-vocabulary_ddialliance_org.cmd tests if the various
representations of the discovery spec can be requested by a related MIME
type
Typo peoperties corrected
typos
Merge pull request #86 from DanSmith/master

Updated incorrect affiliation
DDI concept usage
mappings section
section 5.6 Identification
section limitations
foaf namespace
rdf:Resource --> rdfs:Resource
use of external vocabs as new section
adms namespace to turtle
first working draft on generated html for classes
Merge branch 'master' of https://github.com/linked-statistics/disco-spec
added and modified rdfs:comments for classes to turtle
vocabulary reference
turtle (disco:analysisUnit)
rdfs:Ressource --> rdfs:Resource
rdfs:comment
rdfs:comment