Added cppunit to the ./contrib dir. Build config for x64 and dll builds (some bugs remaining, but most configs are working)

git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@70 67173fc5-114c-0410-ac8e-9d2fd5bffc1f

code/JoinVerticesProcess.h

@@ -59,7 +59,7 @@ namespace Assimp
  * erases all but one of the copies. This usually reduces the number of vertices
  * in a mesh by a serious amount and is the standard form to render a mesh.
  */
-class JoinVerticesProcess : public BaseProcess
+class ASSIMP_API JoinVerticesProcess : public BaseProcess
 {
 	friend class Importer;