Force TechRacer maps when image map is selected. Fixes
Google Code issue #882
If you start a TechRacer map with an image map selected, the resulting map will likely to be completely unplayable.
So this commit disables this.
file(GLOB luafiles *.lua)
install(FILES
${luafiles}
DESTINATION ${SHAREPATH}Data/Scripts)
add_subdirectory(Multiplayer)