add How do I create a new Codebit?
add What is a fork?
Update what-is-a-fork.md

fixing img link
Update how-do-i-create-a-new-codebit.md

added a comma
Merge pull request #160 from AlbionsRefuge/what-is-a-fork

add What is a fork?
Close #160
Adding an article_id
Merge pull request #159 from AlbionsRefuge/how-do-i-create-a-new-codebit

add How do I create a new Codebit?
Close #159
Adding an article_id