Rackspace: add keypair support

lib/fog/rackspace/requests/compute_v2/get_keypair.rb

@@ -0,0 +1,29 @@
+module Fog
+  module Compute
+    class RackspaceV2
+      class Real
+
+        # Returns details of key by name specified
+        #
+        # ==== Parameters
+        # 'key_name'<~String>: name of key to request
+        #         
+        # ==== Returns
+        # * response<~Excon::Response>:
+        #   * body<~Hash>:
+        #     * 'keypair'<~Hash>: Name of key
+        #       * 'public_key'<~String>: public key
+        #       * 'name'<~String>: key name
+        #       * 'fingerprint'<~String>: id
+        #
+        def get_key(key_name)
+          request(
+            :method   => 'GET',
+            :expects  => 200,
+            :path     => "/os-keypairs/#{key_name}"
+          )
+        end
+      end
+    end
+  end
+end