new tools.go file to get code-generator dependency + updated codegen + remove Glide files and update docs

pkg/generated/informers/externalversions/internalinterfaces/factory_interfaces.go

@@ -33,6 +33,7 @@ import (
 	cache "k8s.io/client-go/tools/cache"
 )
 
+// NewInformerFunc takes versioned.Interface and time.Duration to return a SharedIndexInformer.
 type NewInformerFunc func(versioned.Interface, time.Duration) cache.SharedIndexInformer
 
 // SharedInformerFactory a small interface to allow for adding an informer without an import cycle
@@ -41,4 +42,5 @@ type SharedInformerFactory interface {
 	InformerFor(obj runtime.Object, newFunc NewInformerFunc) cache.SharedIndexInformer
 }
 
+// TweakListOptionsFunc is a function that transforms a v1.ListOptions.
 type TweakListOptionsFunc func(*v1.ListOptions)