Use develop branch of dependent gems
Don't auto detect N3 format, as it's too easily confused with Turtle.
Disable debug info collection in rubinius due to string compatibility issue.
Update VERSION for 1.1 and remove JRuby version restriction for Travis-CI.
Use encode! if necessary, rather than force_encoding when reading.
Update dependencies and README.
Support RBX >= 2.1.0.
Add Gemfile dependency on rdf-rdfa.
Finish 1.1.0