Added LICENSE - doesn't seem to be anywhere in the distribution, even…

… the source files refer to it.

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LICENSE.txt

@@ -0,0 +1,49 @@
+====================================================================
+The OpenSymphony Software License, Version 1.1
+
+(this license is derived and fully compatible with the Apache Software
+License - see http://www.apache.org/LICENSE.txt)
+
+Copyright (c) 2001 The OpenSymphony Group. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+
+1. Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in
+   the documentation and/or other materials provided with the
+   distribution.
+
+3. The end-user documentation included with the redistribution,
+   if any, must include the following acknowledgment:
+      "This product includes software developed by the
+       OpenSymphony Group (http://www.opensymphony.com/)."
+   Alternately, this acknowledgment may appear in the software itself,
+   if and wherever such third-party acknowledgments normally appear.
+
+4. The names "OpenSymphony" and "The OpenSymphony Group"
+   must not be used to endorse or promote products derived from this
+   software without prior written permission. For written
+   permission, please contact license@opensymphony.com .
+
+5. Products derived from this software may not be called "OpenSymphony"
+   or "SiteMesh", nor may "OpenSymphony" or "SiteMesh" appear in their
+   name, without prior written permission of the OpenSymphony Group.
+
+THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
+WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
+ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGE.
+====================================================================