Moved CHANGELOG and COPYING to top level, as in our other projects.

Doc/CHANGELOG → CHANGELOG

-BornAgain-0.9    2013.08.23
+BornAgain-0.9, released 2013.08.23
   * FunctionalTests: fitting from python works two times faster than fitting from C++
   * Compile Error on Ubuntu 12.04
   * Strange warning in boost::python api generation
@@ -28,19 +28,15 @@ BornAgain-0.9    2013.08.23
   * Move all IsGISAXS geometries to Core/StandardSample directory
   * cmake build in Ubuntu and corresponding how to in the documentation
 
-BornAgain-0.8.2  2013.07.30
+BornAgain-0.8.2, released 2013.07.30
   * Particle interface changed to accept HomogeneousMaterial
 
-BornAgain-0.8.1  2013.07.26
+BornAgain-0.8.1, released 2013.07.26
   * CMake based build system
   * PythonAPI automatic code generation redesign
   * User Manual v0.1
   * libBornAgainFit
   * FunctionalTest collection
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-BornAgain-0.7.0  2013.04.10
+BornAgain-0.7.0, released 2013.04.10
   * First public release
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