fix visualc.hpp

add `#endif`
add tools darkcult, add testspr/test.sh
fix script
[tools.darkroom] Fix shellscript (lack a '-e' option)
Merge pull request #50 from nekko1119/fix/visualc.hpp

add `#endif`
Merge pull request #51 from kariya-mitsuru/tools.darkroom

[tools.darkroom] Fix shellscript (lack a '-e' option)
add example darkroom/two_spheres.hpp
fix bashscript