initial work for api.

Five method where added:

- /api/info/forum -> contains general forum information.
- /api/info/users -> contains list of users can be ordered.
- /api/info/users/<user_id>/ -> gets specific information from a User.
- /api/info/questions-> contains list of users can be ordered.
- /api/info/questions/<question_id>/-> gets the information from a specific
  question.
Merge branch 'master' of github.com:ASKBOT/askbot-devel into api
Merge branch 'adolfo'
merged the api branch