added the license (MIT)

LICENSE

@@ -0,0 +1,20 @@
+Copyright (c) 2014 New York University
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software 
+and/or hardware specification (the "Work") to deal in the Work without restriction, including 
+without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or 
+sell copies of the Work, and to permit persons to whom the Work is furnished to do so, subject to 
+the following conditions:  
+
+The above copyright notice and this permission notice shall be included in all copies or 
+substantial portions of the Work.  
+
+THE WORK IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 
+OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT 
+HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
+OUT OF OR IN CONNECTION WITH THE WORK OR THE USE OR OTHER DEALINGS 
+IN THE WORK. 
+