refactor visualization
visualization data with bar chart
Merge pull request #86 from leituo56/sammie_visualization

Sammie visualization : data with bar chart
change bar color
Merge pull request #87 from leituo56/sammie_visualization

change bar color
fixed floating bar pos, added 'top' to floating filter bar
Merge pull request #88 from leituo56/dev_jenn2

fixed floating bar pos, added 'top' to floating filter bar
Merge branch 'dev-xiaoli'

* dev-xiaoli:
  Pie Charts in site_stat page. add logo images in static/images/

Conflicts:
	src/SocialNwk/Photographer/static/site_stat.js