Code cleanup: remove references to svn and code style

CMakeLists.txt

build_files/cmake/cmake_consistency_check.py

build_files/cmake/example_scripts/cmake_linux_install.sh

source/blender/blenkernel/intern/tracking_detect.c

source/blender/blenkernel/intern/writeffmpeg.c

source/blender/blenlib/intern/smallhash.c

source/blender/editors/gpencil/gpencil_edit.c