Add LICENSE

LICENSE

+          ARIA -- Ambiguous Restraints for Iterative Assignment             
+                                                                            
+                A software for automated NOE assignment                     
+                                                                            
+                               Version 2.3                                  
+                                                                            
+
+Copyright (C) Benjamin Bardiaux, Michael Habeck, Therese Malliavin,        
+              Wolfgang Rieping, and Michael Nilges                       
+
+All rights reserved.                                                       
+                                                                           
+NO WARRANTY. This software package is provided 'as is' without warranty of 
+any kind, expressed or implied, including, but not limited to the implied  
+warranties of merchantability and fitness for a particular purpose or      
+a warranty of non-infringement.                                            
+                                                                           
+Distribution of substantively modified versions of this module is          
+prohibited without the explicit permission of the copyright holders.       
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