Merge pull request #66 from chiaS/master

edit requirements section in README
fix syntax error
add pitchfork cover image url
add pitchfork artist list
resovled conflict on requests.js
Merge pull request #71 from WillSen/iss69

add pitchfork cover image url
Merge pull request #73 from WillSen/iss70

Iss70 add pitchfork artist list
Merge pull request #74 from chiaS/master

display more info