Improve About Page

[vkoves]

Right now our about page looks like this:

There's a few things the about page should do:

1. Give people information of the version of Scroll Stop they are running
2. Answer any common questions about Scroll Stop
3. Promote indigoBox

To do this, let's do the following:

[ ] Add dynamic Scroll Stop version number (if possible)
[ ] Add link to our Twitter
[ ] Make links clearer

[vkoves]

Two more things this page should likely do:

• Invite users to share (share buttons?)
• Link to our GitHub for anyone tech savvy