adds tween and easing classes (with algorithms from Robert Penner) to handle animation

git-svn-id: http://svn.openlayers.org/trunk/openlayers/doc@6097 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

authors.txt

@@ -34,3 +34,6 @@ in doc/licenses/APACHE-2.0.txt.
 
 Some portions of OpenLayers are used under the MIT license, availabie in 
 doc/licenses/MIT-LICENSE.txt.
+
+Some portions of OpenLayers are Copyright 2001 Robert Penner, and are used 
+under the BSD license, available in doc/licenses/BSD-LICENSE.txt

licenses/BSD-LICENSE.txt

@@ -0,0 +1,28 @@
+Redistribution and use of this software in source and binary forms, with or
+without modification, are permitted provided that the following conditions are
+met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
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+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of Yahoo! Inc. nor the names of its
+  contributors may be used to endorse or promote products
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+  written permission of Yahoo! Inc.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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