Merge pull request #23 from ciudadanointeligente/dev

Initial migrations using south
Merge branch 'basic_user_workflow' of github.com:ciudadanointeligente/write-it into dev
Fixing migration
Resolving conflicts about migration
Merge branch 'basic_user_workflow' into dev
Merge branch 'dev' of github.com:ciudadanointeligente/write-it into dev