Add vim modelines to all CMake files

Signed-off-by: Uli Schlachter <psychon@znc.in>

Packaging.cmake

@@ -64,3 +64,5 @@ set(CPACK_PACKAGE_DESCRIPTION_SUMMARY "A tiling window manager")
 if(CPACK_GENERATOR)
 	include(CPack)
 endif()
+
+# vim: filetype=cmake:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80:foldmethod=marker

docs/load_ldoc.cmake

@@ -16,3 +16,5 @@ foreach(doc_file_name ${doc_files})
     # Create a new variable usable from lua files
     set(DOC_${DOC_FILE_NAME}_COMMON "Imported documentation\n\n${doc_file_content}")
 endforeach()
+
+# vim: filetype=cmake:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80:foldmethod=marker

docs/widget_lists.cmake

@@ -47,3 +47,5 @@ endfunction()
 generate_widget_list( "container" )
 generate_widget_list( "layout"    )
 generate_widget_list( "widget"    )
+
+# vim: filetype=cmake:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80:foldmethod=marker

tests/examples/CMakeLists.txt

@@ -259,3 +259,5 @@ foreach(file ${test_files})
 endforeach()
 
 message(STATUS "Example tests passed.")
+
+# vim: filetype=cmake:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80:foldmethod=marker