Move class ColorSchemeMananger into its own file

class KDE3ColorSchemeReader is also moved since it is supposed to an
compatibility helpr of which class ColorScheme does not need to know,
and eventualy it should be removed

src/ViewManager.cpp

@@ -38,6 +38,7 @@
 #include <konsoleadaptor.h>
 
 #include "ColorScheme.h"
+#include "ColorSchemeManager.h"
 #include "ProfileList.h"
 #include "Session.h"
 #include "TerminalDisplay.h"