The first topic information on welcome page.
Using tag <%page> to split source code
Finish #1, The small style of topicInfo in welcome and forums pages.
Move my css import from welcome/index.mako to the base.mako.
Delete function get_profile_picture_url in user model
Merge pull request #3 from sdayu/feature/topicInfo

merge form xzero
Feature/topic info