Add lease_policy spec
Update README.md
Add options for Net::SSH
Exclude gems for vnctl
Add support for ssh agent
Add lease_policy spec
Merge branch 'master' into feature-lease-policy
Merge branch 'feature-lease-policy' of github.com:axsh/openvnet-testspec into feature-lease-policy

Conflicts:
	dataset/lease_policy.yml
	lib/vnspec/dataset.rb
	lib/vnspec/models.rb
	lib/vnspec/spec/lease_policy_spec.rb
Merge pull request #45 from axsh/feature-lease-policy

Feature lease policy