deleted nt and rdf testdata
readme update
readme added image
added support for reviewer
fixed many small typos
fixed testdata and reviewer in GET
reviewer addition
POST now supports reviewer, creates new unique reviewer and account if not found
added sanitize rules for teaser and abstract
updated readme
updated readme
sample on manifestation
sample on cover_url
typo in source base
split testdata into separate graphs
fixed isbn sanitize
allow unwanted characters in isbn parameter, stripped in api
allowed some more tags in text and teaser and updated README