clean up home.html
decrease height of challenge list items and on hover blue
add gray border
blue border
blue background
ui changes
 (blue on blue -> black/grey on blue)
change review icon from comment to comments
bold to normal
> separator for course attributes
course details in gray..and UI changes for review details
avatar image url radius made to 2 px consistent with tool bar profile pic
clean attempt_score.html
typography kerning for course_details
change colors for attemp_scores
clean home.html
Merge pull request #180 from anubhavsinha/#15_home.html_new

clean up home.html