Added the README file.

README.md

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+# What is Vitro?
+Vitro is a general-purpose web-based ontology and instance editor with customizable public browsing. 
+
+Vitro is an integrated ontology editor and semantic web application.
+
+Vitro is a Java web application that runs in a Tomcat servlet container.
+
+With Vitro, you can:
+* Create or load ontologies in OWL format
+* Edit instances and relationships
+* Build a public web site to display your data
+* Search your data with Apache Solr
+
+Vitro was originally developed at Cornell University, and is used as the core of the popular
+research and scholarship portal, [VIVO](http://vivoweb.org) .
+
+For more information, contact the [VIVO community](http://vivoweb.org/contact).
+