set ruby version to 1.9.3-p448 in .ruby-version.
exec bundle gem dxruby_sdl.
fix spec.
require 'dxruby'. (pt-56571522)
add #*# and .#* to .gitignore.
use coveralls.
added coveralls status.
added build status on Travis CI.
added dependency status on Gemnasium.
added security checking stutus by Code Climate.
added rubysdl and rsdl.
added DXRubySDL::Window skelton.
added SDL and SGE installation.
added require 'sdl'.
added before_install to install libsdl1.2-dev.
added before_install to install libsdl-sge-dev.
show black screen.
implemented Window.loop {}.
fix build on Travis CI from http://stackoverflow.com/questions/15859196/travisci-no-audio-device.
added travis-lint gem.