Petites modifications
	modified:   _dbconfig.php
Merge branch 'master' of https://github.com/xnoumbis/judodb-backend
Merge branch 'master' of github.com:patricklam/judodb-backend
Added new tables in the database to support multiple clubs:
 club, user_club, client_club

	modified:   db.sql
Fixed syntax
	modified:   db.sql
Now returns only clients of clubs to which the 'user'
has access rights.

	new file:   _userutils.php
	modified:   pull_client_list.php
Added folder for test cases

	new file:   tests/test_userutils.php
Added initial test files

	new file:   _testutils.php
	modified:   test_userutils.php
Merge pull request #2 from xnoumbis/master

Start Discussion about latest changes on clients filtering based on club, and testing