1. Migrate Data, Task, Method, Challenge, About, User Creations, User
logins, uploader, paginator into django 1.5. 2. fix bugs in paginator,
recapcha, user login success info. 3. forums and blog are half migrated,
will migrate them soon. 4. remove old version markdown in the repo and
choose pip python-markdown as default
Merge pull request #14 from ZhengyangL/master

Migration