move rspec options to .rspec file
remove sandbox cube
drop 1.8 support
let's go, use first refinements!
remove kernel and not cubes
remove ALL debug gems, will be an extra gem
remove os cube, use os gem instead!
add @rkh's refine gem
also move all env cubes to extra gems!
remove compability and discussion from documentation
tweaks
refactor to use refinements; move to_proc to procstar gem; update documentation
update gemspec
update readme
release zucker v100