Display inrow AC racks in rack/rackrow views

We display those racks via setting background color to red and using the
icon-tint icon from bootstrap's glyphicons
Search for keyvalue values in hwdoc

Allow searching for the newly added keyvalue pairs in hwdoc. This should
allow to easily search for stuff like asset tags, warranties etc
Undo displaying populated rows colored

It turned out to be not eye friendly. Just display them as normal. Also
have striped effect enabled again. And do not use the remove sign since
it also is counterintuitive
Provide initial_data for keyvalue store

Some initial data like contract and asset tag for keyvalue store
Adding Ticket model

Adding a new model with an M2M relation to equipment. The idea is to
store the ticketing info in order to easily assess an equipment
situation concerning known issues. Also fix a minor search issues with
racks in admin site. Updating tests as well
Migrate old ticketing to new modular one

Have all view and templates use the new ticketing system. Finally fix
statistics in overview page to correctly display machines with tickets.
Datacenter page now is capable of display rackrows with tickets.
Adding the possibility to actively query a ticketing system for tickets
associated with a set of Equipments. This is implemented through a
django management command designed to be run via cron and given a set of
equipments (or all in the database) and query a ticketing system in
order to populate Ticket models. The system is modular in order to allow
for multiple Ticketing systems. Two ticketing system implementations are
provided. One dummy (doing nothing) and one depending on comments having
URLs matching an administrator specified pattern
Tests updated as well
Display inrow AC racks in rack/rackrow views

We display those racks via setting background color to red and using the
icon-tint icon from bootstrap's glyphicons
Merge branch 'undoinfos'
Merge branch 'attrs_search'
Merge branch 'ticketing'

Conflicts:
	servermon/projectwide/templates/hwdoc_searchresults.html