use twitter boostrap
page /group/<code>
change pages /groups, /group/xx, user/xx, /servers
- server.py: clean up _debug calls
.nfs, .ldap: bugfix border-radius
typo menu.nav
- change pages /logs, /news, /server_nfs/xxx /users/xxx and (base.tpl)
  to boostrap classes
base.tpl: bugfix .box
Release 14
def _nav: change in comment test