add What do the symbols beside my code mean?
Update what-do-the-symbols-beside-my-code-mean.md
updating img file
Merge branch 'what-do-the-symbols-mean' of github.com:AlbionsRefuge/help.codecademy.com into what-do-the-symbols-mean
Update what-do-the-symbols-beside-my-code-mean.md

reworded the bullet points for consistancy
Merge pull request #164 from AlbionsRefuge/what-do-the-symbols-mean

add What do the symbols beside my code mean?
Close #164
Adding an article_id
removing an unneeded image file