Removed redundant PNGs and updated the image compressor.
Removed redundant PNGs and updated the image compressor.


Former-commit-id: f963670e1bfdbd373bcae8d8158f559a37c89d20
JeffreyBLewis/WebVoteView,JeffreyBLewis/WebVoteView,JeffreyBLewis/WebVoteView,JeffreyBLewis/WebVoteView