Added notes on installing on windows
Added notes on installing on windows

Added a link to rubyinstaller.org where you can find the devkit.
jeangougou/jeangougou.github.io,jeangougou/jeangougou.github.io,hamchapman/pma-communications,ageitgey/amplify,ageitgey/amplify,dsdeiz/fr.ench.info,rabbots/rabbots.github.io,rabbots/rabbots.github.io,hamchapman/pma-communications,Guilda/Guilda.github.io,Guilda/Guilda.github.io,jeangougou/jeangougou.github.io,dsdeiz/fr.ench.info,dsdeiz/fr.ench.info