Add readme

README.md

+# Knowledge Graph Resources
+
+A collection of useful knowledge graph papers, tutorials, etc.
+
+## Links
+
+Links to knowledge graph resources.
+
+### Tools
+
+Knowledge graph and graph database software.
+
+* [TinkerPop3](http://tinkerpop.incubator.apache.org/docs/3.0.1-incubating/) -
+  provides graph computing capabilities for both graph databases (OLTP) and
+  graph analytic systems (OLAP) under the Apache2 license.