refine avatar, add emotion sprites. (h-brows, h-mouth) is the happy set; (s-brows, s-mouth) is the surprised set; (a-brows, a-mouth) is the angry set. All emotion sprites are set at an aspect ratio to fit the avatar's full size of 1000x1000px
Merge branch 'master' of https://github.com/paceuniversity/gsd2014-team3