Fixed indentation and formating in lan_proposal.

Conflicts:
	src/clients/lan_proposal.ycp
Exclude S390 from virtualization proposals. bnc#817943

Conflicts:
	src/clients/lan_proposal.ycp
Refactoring params handling in lan_proposal / MakeProposal.

Conflicts:
	src/clients/lan_proposal.ycp
Updated changelog.

Conflicts:
	VERSION
Merge pull request #89 from mchf/master

Do not propose bridge device for virtualization host on s390