DBpedia resources reflect in triples

* corrected invalid code and indentation in index.html.
* user can now associate dbpedia resources with triples.
* fixes saifulnipo/eis-semantic-annotation#10
* property and object dropdown list functionality improvements (returns
URIs in addition to labels).
* Fixes bug where user's text selection could also include non-PDF text.
* js\sparql.js - created object for triple resources and labels.
Optimised text camelisation. sparql queries now also reflect the
presence of resources, not only literals.