Pie Charts in site_stat page. add logo images in static/images/
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
fix percantage in bar chart
Merge pull request #89 from leituo56/sammie_visualization

fix percantage in bar chart
load photos to site_stat page
Merge branch 'dev-xiaoli'

* dev-xiaoli:
  load photos to site_stat page
Merge pull request #90 from leituo56/dev_jenn2

restyling of photo detail page, change content