[client][modules] implement default behavior for module initialization
[client][userlist] initialize at the right time

Fixes #137
beginning of home
[client][home] reindent view
[client][home] tabs animations
[client][home] add signin tab
[client][textchat] change font sizes

13px for all elements but the time (which is 12px)
[client][userlist] always place local thumbnail first
Merge pull request #146 from Paulloz/chattextfontsize
Merge pull request #4 from Paulloz/sweethome

Sweethome
[client][userlist] reimplement multi-column thumbnails

Fixes #147
Put Beta logo.
Fix wrong button in join tab.
[client][userlist] reinstore hover controls right behavior
[client][home] hide signup
[client][css] base reset css
[quicklogin] re-link client and server
[quickjoin] re-link client and server
[client][home] repair animations even with the form tags
Merge pull request #148 from Paulloz/multicolumnthumbnails