Fnlb/k8s grouper (#563)

* WIP: add k8s grouper

- This shares a great deal of behaviour with allGrouper. Once it's
tested, refactor that to share as much as possible

- Glide hell. Checked in the yaml and lock files but a glide i -v
will be required to bring vendor/ up-to-date. Will address once this
is ready.

* Update README. Make the watch tracking work.

(To follow: add the junk that was pulled in via the glide update.)

* Vendor updates.

* go fmt

* Use the allGrouper with a k8s-backed DBStore instead.

This is much tidier :-)

* Fix up go vet

vendor/github.com/ugorji/go/codec/values_test.go

@@ -126,18 +126,7 @@ func newTestStruc(depth int, bench bool, useInterface, useStringKeyOnly bool) (t
 				"Afour.reverse_solidus.\u005c", "Afive.Gclef.\U0001d11E"},
 			AI64slice: []int64{1, -22, 333, -4444, 55555, -666666},
 			AMSU16:    map[string]uint16{"1": 1, "22": 2, "333": 3, "4444": 4},
-			AF64slice: []float64{
-				11.11e-11, -11.11e+11,
-				2.222E+12, -2.222E-12,
-				-555.55E-5, 555.55E+5,
-				666.66E-6, -666.66E+6,
-				7777.7777E-7, -7777.7777E-7,
-				-8888.8888E+8, 8888.8888E+8,
-				-99999.9999E+9, 99999.9999E+9,
-				// these below are hairy enough to need strconv.ParseFloat
-				33.33E-33, -33.33E+33,
-				44.44e+44, -44.44e-44,
-			},
+			AF64slice: []float64{11.11e-11, 22.22E+22, 33.33E-33, 44.44e+44, 555.55E-6, 666.66E6},
 		},
 	}
 	if useInterface {