Added midterm

My midterm uses Hacker News to pull the latest/top 10 stories and then shuffle through them or open them in the browser according to user's input. 

I had some difficulty with the pulled/parsed data because it was a hash within an array within a hash, and so on. I am sure my working solution can be refactored. It's definitely kind of a mess.

I also ran into difficulty with undefined methods and variables and so on, but ended up making everything work by some miracle.