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

The code using this was deleted in commits 5a2a8db and cf6260a
Fixed proposal when virtual machine pattern is selected. bnc#884517
Cleanup - dropped unneccessary imports from Lan module
Updated changelog
Updated documentation.
Merge pull request #221 from mchf/bnc884517-invalid-hostname

Fixed incorrect proposal when virtual machine pattern is selected
Enabled Add button in Overview during installation. bnc#889359
Updated changelog
Merge pull request #224 from mchf/bnc889359-add-button-installation

Enable Add button in Overview dialogue during installation
taking wicked as default if NeteworkManager is not available