Finish 1.1.3.

* Fix bug where BNode identifiers were not cached when parsing.
Unit test update for the latest version of the rdf-turtle library
Fixing an issue with multiple ORDER BY criteria (only the first sort criterion was taken into account) and the order for missing values, blank nodes, IRIs and literals
Update contributor information.
Merge pull request #16 from michivi/sparql-order

ORDER BY and value comparison fixes
Version 1.1.4.
Release 1.1.4.

* Fixed an issue with multiple ORDER BY criteria and the order for missing values, blank nodes, IRIs and literals (@michivi)