add visualization css into site_stat.css
Merge pull request #42 from leituo56/sammie_visualization

add visualization css into site_stat.css
Merge pull request #43 from leituo56/dev-xiaoli

add icon yellow sets
edit stat_visualization
Merge pull request #44 from leituo56/sammie_visualization

edit stat_visualization
add xiaoli's icons to explore page
Merge pull request #45 from leituo56/dev_jenn2

add xiaoli's icons to explore page