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


Former-commit-id: f4bbe05bd1427e007e8741d5709d1059efaa2d32
JeffreyBLewis/WebVoteView,JeffreyBLewis/WebVoteView,JeffreyBLewis/WebVoteView,JeffreyBLewis/WebVoteView