Improve accuracy and tone.
Incude link to COPPA
Create can-i-navigate-codecademy-courses-with-keyboard-shortcuts
Changed link for COPPA and reverted  accidental article add
Merge https://github.com/cuttarug/help.codecademy.com into patch-5
Reverted accidental article add
Merge pull request #1 from JoahG/patch-5

Changed link for COPPA and reverted  accidental article add
Merge pull request #42 from cuttarug/master

How old do I have to be to sign up for Codecademy?