Added connectionManager, friendList and friendListGUI classes
Added packet handlers for getting friend info and seraching friends.
Added registration and login js
Finished first version of friendList handling in friendList.js
Merge branch 'develop' of github.com:alekgajos/Jamii into develop
Add authentication functions, add users db class

* add User class with import/export functionalities
* add UsersDatabase class for saving/restoring User data (closes #9)