Change formatting in server.js

* add vim modeline (tabstop = 4, shoftwidth = 4, noexpandtab)
Loading the friends data, displaying the friend list in GUI.
Add displaying avatars in the friend list.
Update server.js - add registration feature

* add _registration_date to User class
* add methods documentation
* fix UsersDatabase constructor (now use synchronized version of
* fs.exists)
Add User::strip_object() method
starting conference implementation.
Merge branch 'develop' of https://github.com/Regalis/Jamii into conference
Update server.js - store socket object instead of socket.id
Merge branch 'develop' of github.com:matteozajac/Jamii into develop
conrefence class
Fized merge conflicts with Regalis/develop

Conflicts:
	src/server.js
Fixed registration on client side.
Fix typo in registration method
Changed design, added javascript to bottom panel
Merge branch 'develop' of github.com:Regalis/Jamii into develop
Fixed friend_list field on sever.
Add search methods in server.js
Merge branch 'develop' of github.com:alekgajos/Jamii into develop
Fix: server serving the friends data list
Fix in search methods