Update urls.py
add test code for TeamManager's create_team
add Test code for get_all_teams & implementation code for model
add test code about get_team & implementation pulling team name
Add test code for Validation team name & implementation about team name in case of max length 30
Merge pull request #19 from wikibootup/feature/Team_Apply

Team Manager minor Feature(create, get all, get) for applying team
refactor Project test
Merge branch 'master' of https://github.com/buildbuild/buildbuild
update Project
refactor Project model & test
update requirements.txt : add celery
add celery module
update requirements.txt : add django-celery
update settings.py : add djcelery in INSTALLED_APPS
update settings.py : django-celery setting for DB
fix settings.py : import should be on the top
Merge branch 'feature/integrate-celery' into develop

* feature/integrate-celery:
  fix settings.py : import should be on the top
  update settings.py : django-celery setting for DB
  update settings.py : add djcelery in INSTALLED_APPS
  update requirements.txt : add django-celery
  add celery module
  update requirements.txt : add celery
update project model : project must have name
Merge pull request #20 from o8151814/master

update project models & test ( but need more improvements )
Merge pull request #21 from dobestan/develop

[Sprint #4] Integrate with Celery