alessio contribution to the ee install guide: keypairs on aws are by region
knife bootstrap accespts default recipes list"
Merge branch 'master' of https://github.com/choreos/choreos_middleware

Conflicts:
	Commons/src/main/java/org/ow2/choreos/chef/Knife.java
	Commons/src/main/java/org/ow2/choreos/chef/impl/KnifeImpl.java