Made YARD see the attributes of LanItems.

documenting them is more tricky because the most relevant comments are
inside #main at the beginning of the file
LanItems documentation.
moved a variable declaration towards other variables
Merge pull request #220 from mvidner/doc-lanitems

LanItems documentation.
Don't propose firewall if not selected for installation (bnc#881250)
Changelog and version updates
Merge pull request #222 from ancorgs/adjust_firewall_proposal

Don't propose firewall if not selected for installation (bnc#881250)
When firewall is disabled hide details in proposal (bnc#886554)
Changelog and version updates
Merge pull request #223 from ancorgs/hide_firewall_settings

When firewall is disabled hide details in proposal (bnc#886554)
Removed obsolete and currently unused proposals
Fixed proposal when virtual machine pattern is selected. bnc#884517
Cleanup - dropped unneccessary imports from Lan module
Updated changelog