Added dependency to thin <2.0.0
Dependency to thin in one command
VM finalization and customization processed in separate thread
Use pessimistic operator in thin dependency, so that matches >= 1.2.5,  < 2.0.0
Reboot instance for vcloud
Improved response time on instance fetching

Conflicts:
	server/lib/deltacloud/drivers/vcloud/vcloud_driver.rb
fixed typo in volume converion
Merge branch deltacloud-core-dev into master