added linux opencs.desktop file

CMakeLists.txt

@@ -300,6 +300,8 @@ configure_file(${OpenMW_SOURCE_DIR}/files/openmw.cfg
 if (NOT WIN32 AND NOT APPLE)
     configure_file(${OpenMW_SOURCE_DIR}/files/openmw.desktop
         "${OpenMW_BINARY_DIR}/openmw.desktop")
+    configure_file(${OpenMW_SOURCE_DIR}/files/opencs.desktop
+        "${OpenMW_BINARY_DIR}/opencs.desktop")
 endif()
 
 # Compiler settings

opencs.desktop

@@ -0,0 +1,9 @@
+[Desktop Entry]
+Type=Application
+Name=OpenMW Content Editor
+GenericName=Content Editor
+Comment=A replacement for the Morrowind Construction Set.
+TryExec=opencs
+Exec=opencs
+Icon=opencs
+Categories=Game;RolePlaying;