Remove local-use of rdf-spec from Gemfile, and don't use bundler by default when running specs (to allow local rdf-spec to be used more easily).
Added RSpec rake tests, and run rspec by default.
Pull rdf-spec from GitHub in Gemfile.
Added .travis.yml.
Use public git location in Gemfile.
Convert GMT to Z in date, time and dateTime literals.
Account for format returning nil (rare RBX case).
Remove XMLLiteral non-support, and pending tests. XMLLiterals (and HTML literals) now supported in RDF::XSD.
Update README
Release 0.3.8
Turn off Rubinius 1.8 mode, which is problematic.
Added travis-ci badge.
Writer.buffer: raise if no block provided
Merge pull request #4 from mistydemeo/buffer

Writer.buffer: raise if no block provided
Update DateTIme and Time to use %:z formatting.
Use %.15e formatting for Double, which avoids a nasty Ruby error.
Fix List implementation when creating list of list.
Move #valid?, #invalid?, #validate, and #validate! to RDF::Value, so it is available for all appropriate clases.
Added exhaustive URI (IRI) validation (>= Ruby 1.9 only).
Make Statement validation also validate components.
Mote time fixes for Ruby 1.8.7 and jruby differences.
Make sure to not force encoding on a frozen string. Addresses Issue #5.
Update graph to note that in the next release, graphs will not be named.