Accept URI without scheme and complement it with http
Accept URI without host and complement it with server definition and IP address
Add an integration test for path only URI
Add Server#ssh method

so that could execute multiple commands on current server at once.
[REFACTORING]Use Server#ssh in #ssh_exec
Merge pull request #28 from KitaitiMakoto/uri-omission

Accept URI without scheme and host
Merge pull request #30 from KitaitiMakoto/multi-ssh-exec

Add `Server#ssh` method
Add infrataster command.
Merge pull request #31 from ryotarai/bin

Add infrataster command.
version++
Update CHANGELOG.
Merge branch 'master' into before-all-context

Conflicts:
	spec/integration/other_spec.rb
Don't use let declaration in before :all block because of deprecation