Add team field validation code about contact number & website url
modifying invalid long length variables. (ex : "aaa....a"    to     "a" * numbers)
Resolve m2m relationship in waitList & add default test file for wait list
Merge branch 'feature/Team_Apply' of https://github.com/wikibootup/buildbuild into feature/Team_Apply

Conflicts:
	buildbuild/teams/tests/test_team_manager.py
add test code for Wait List
add validation code on get_user (email)
Add WaitList Manager, and it's method (append to list, get list)
Add delete code for WaitList & divide method to check target is in WaitList
add Test code for delete from Wait List
Merge pull request #22 from BOBTommy/feature/Team_Apply

[Sprint 4] WaitList Test code & it's implementation code