Add update server capability.
This requires an updated version of Perigee, for it lacked a Put()
method. Make sure you "go get -u github.com/racker/perigee" prior to
testing, or you'll get method not defined errors.
diff --git a/interfaces.go b/interfaces.go
index 2bb8ac5..8e02fc3 100644
--- a/interfaces.go
+++ b/interfaces.go
@@ -38,6 +38,7 @@
RebootServer(id string, hard bool) error
RescueServer(id string) (string, error)
UnrescueServer(id string) error
+ UpdateServer(id string, newValues NewServerSettings) (*Server, error)
// Images