Rename plugins.(h|cpp) to decorations.(h|cpp)

CMakeLists.txt

@@ -108,7 +108,7 @@ set(kwin_KDEINIT_SRCS
    main.cpp 
    options.cpp 
    outline.cpp
-   plugins.cpp 
+   decorations.cpp
    events.cpp 
    killwindow.cpp 
    geometrytip.cpp 

decorations.cpp

@@ -19,7 +19,7 @@ You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *********************************************************************/
 
-#include "plugins.h"
+#include "decorations.h"
 #include "config-kwin.h"
 
 #include <kglobal.h>

workspace.h

@@ -35,7 +35,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 // need to include utils.h before we use the ifdefs
 #include "utils.h"
 
-#include "plugins.h"
+#include "decorations.h"
 #include "kdecoration.h"
 #include "kdecorationfactory.h"
 #include "sm.h"