Added Titan to README.textile.

README.textile

@@ -10,6 +10,7 @@ Blueprints is a "property graph model interface":http://github.com/tinkerpop/gre
 ** "OrientDB":http://www.orientechnologies.com/ graph database
 ** "DEX":http://www.sparsity-technologies.com/dex graph database
 ** "InfiniteGraph":http://www.infinitegraph.com/ (available "here":http://wiki.infinitegraph.com/2.1/w/index.php?title=InfiniteGraph_Tinkerpop_Blueprints_Implementation)
+** "Titan":http://thinkaurelius.github.com/titan/ (available "here":http://thinkaurelius.github.com/titan/)
 ** "Rexster":http://rexster.tinkerpop.com graph server
 ** "Sesame 2.0":http://www.openrdf.org compliant RDF stores
 **** "MemoryStore":http://www.openrdf.org/doc/sesame2/users/ch08.html#d0e705, "NativeStore":http://www.openrdf.org/doc/sesame2/users/ch08.html#d0e746, "LinkedDataSail":http://code.google.com/p/ripple/wiki/LinkedDataSail, "SPARQLRepository":http://www.openrdf.org/doc/sesame2/api/org/openrdf/repository/sparql/SPARQLRepository.html