Add GitHub and LinkedIn links for coaches

[SamSamskies]

This popped into my head because students were asking for Nate's GitHub after he presented at the hackathon this weekend. I think this would be useful for students.

[NathanielWroblewski]

Lord, I hope you withheld my info. Dat code is straight GROSS

[NathanielWroblewski]

Where would we add this info?

[SamSamskies]

on the team page. I'll finish my PR tonight to consolidate app into one page.

[jonathanpeterwu]

yea links to github pages would be helpful. I'm assuming when we move over to pulling from the github api we can grab that info as well