Merge pull request #2 from cordawyn/master

Miscellaneous clean-up stuff
bumped dependency on MissingH to 1.2.0.0 for ghc 7.6
Added .travis.yml to trigger the Travis build system
Fixed URI serialization bug in TurtleSerializer
. Also added ns_mappings in Data.RDF.Namespace. Bumped to 1.0.2
Refactored all type declarations into Data.RDF.Types
Merge branch 'master' of github.com:robstewart57/rdf4h