(feat) add meeting manager
(feat) add meeting and user object to meeting manager with ability to add and get users and meetings.
(feat) add meeting manager
(feat) add meeting and user object to meeting manager with ability to add and get users and meetings.
resolve merge conflict

Conflicts:
	package.json
(fix) fix addUser for meeting manager
Merge pull request #31 from huyphamily/master

(feat) add meeting manager object