Show only published Software Products which have preselected the best possible
Software Release and reneder link to directly order this one.

Instead of using cryptic table and Software Product unrealted interactions run
alarm few times per day, which will select the best possible (if available)
Software Release for each Software Product.

Use editable columns with non editable cells, which will render links.

Avoid playing directly with deliveries and reuse direct linking between
Software Installation and Computer.

Also move out error reporting from Computer to Software Installation.

It will be used to relate with Computer.

This document will represent state of installation software on computer.

Conflicts:
	slapos/grid/slapgrid.py
	slapos/tests/slapgrid.py

Add periodicity and factored tests

Fix 77bc6c75

Also use this code in test.

It will be used during allocation.

Allow to add new networks. Allow to associate Computer into networks. Allow to
see list of Computers in network.