Update docs.step

just a minor typo
Merge pull request #323 from mfjenn/patch-1

Update docs.step
Add link to intro to javascript to docs
Merge branch 'add-link-to-intro-to-javascript' of https://github.com/zspencer/docs into zspencer-add-link-to-intro-to-javascript
Remove "Windows Colors" from the curriculum

Having colors in Windows is great, but it's not worth making students
drag stuff into their system32 folder if they're not already super
comfortable using their computers. Also, the ansicon software keeps
getting hosted on shady / disappearing websites.
link was out of date
Update more references of rvm.beginrescueend.com to rvm.io