Add support for CMake
fix tuple_element order
refix tuple_element roder
fix pack_get order
fix forward_clist
fix constructor
fix swap
fix forward_clist iterator
fix
fix iterator compare
fix darkroom: add alpha and refraction material parameter
add is_from_inside property
[sprout.darkroom] implemented refraction
[sprout.darkroom] implement refraction process
fix README
Merge pull request #57 from Fadis/cmake

Add support for CMake
fix math::cos