support for rdfstore.js

[mathib]

Suggestion for enhancement: For simple static demos, a client-side, in-memory RDF store would be useful (e.g. rdfstore.js). The user only has to provide a valid RDF file (reading from a local or online file, e.g. hosted on Github as Raw Githubusercontent, Dropbox with Direct Link), which can then be browsed using LD-R. No reasoning and federated querying is supported by rdfstore.js, so it would only be useful to simply demonstrate a small dataset and how it would look in LD-R