Starting big code cleanups
More code cleanups / memory optimizations in progress
Further progress in code cleanups
recoded php internal state handling to integers ; other small fixes
All sidebar nodes are now expandable
fixed page flipping on scrolled pages
Merge branch 'master' into nagvis-1.8
Implemented a contact group membership based authorisation module
Removed never really used uifx/netmap code (at least not public used)
Fixed bug in state handling of hostgroups
Fixed host state handling
Fixed state name processing for hosts
Supporting merge of groups from different backends

It is now possible to merge states of host, hostgroup and servicegroup
objects with equal names from different backends. For example, this
can be used to create a single hostgroup object on a map which is
populated by different hostgroups from several monitoring instances. This is
simply configured by putting several backend ids to the backend_id
parameter (separated by ",").
Slightly more comfortable editing dropdown fields with multiple possible choices
Implemented new object type: dynamic groups
Merge branch 'nagvis-1.8'
Single maps on overview page are processed individually on initial page rendering
Using state text as state img alternative text now
small restructuring
FIX: Fixed centering of overview tables when opening the sidebar