backporting from ispc-larry: country-flags in lists, added groups to admin/users list, added icons for user_typ

correction of broken css-class for dashboard warnings + add of state-icon for dashboard warnings + removal of empty <p>-element in dashboard warnings

changed server_list display to usage of sprite images + reduction of hardcoded <br>-elements + additional support for distro icons in server_list

added .label + .value class for non-INPUT details in edit forms; changed class for measurement unit to .label -> better output + reduction of unnecessary non-breaking spaces

all flags as separate .png files: https://github.com/downloads/foe-services/ispc-larry/flags_separate.rar
.psd files for all flags as layers and sprite: https://github.com/downloads/foe-services/ispc-larry/flags_psd.rar

- Added Tipsy (http://onehackoranother.com/projects/jquery/tipsy/) so that one can create tooltips for additional explanations easily.