New-pykube

* Added `PodDisruptionBudget`
* Added HTTP timeout (default: 10 seconds)

* New release as `pykube-ng`
* Removed Python 2.7 compatibility
* Removed HTTPie plugin
* Added some tests

* added Kubernetes API objects:
* `CronJob`
* `PodSecurityPolicy`
* `LimitRange`
* `pykube` namespace exposes `PersistentVolume` and `PersistentVolumeClaim`
* Ensure six >= 1.10.0 is installed (fixed 116)
* `StatefulSet` learned to scale by inheriting from `ReplicatedMixin` and `ScalableMixin`
* `Query` learned to carry forward field selector during a clone
* `Query.watch` learned to carry forward all query parameters
* `APIObject` learned `watch` to enable per-object watches
* `Deployment` learned to roll back using `rollout_undo` similar to `kubectl rollout undo deployment`

Features

* added Kubernetes API objects:
* `Role`
* `ClusterRole`
* `RoleBinding`
* `ClusterRoleBinding`
* `StatefulSet`
* `HTTPClient` learned to handle GKE OAuth authentication
* `HTTPClient` learned `version` to report Kubernetes version
* `Pod` learned to retrieve logs for containers
* `Query.filter` learned to scope based on fields
* Fixed handling of Kubernetes certificates for Python versions < 3.5
* Kubernetes 1.5 compatibility
* `APIObject` learned `metadata` and `labels` properties
* `KubeConfig` learned `namespace` and depedent objects use it more sanely

Features

* added Kubernetes API objects:
* `Event`
* `ResourceQuota`
* `ServiceAccount`
* `ThirdPartyResource`
* `PetSet`
* `HorizontalPodAutoscaler`
* `KubeConfig` learned to handle empty or missing user configuration
* `HTTPClient` learned to create an HTTP session with no authentication
* `Deployment` learned to report itself ready

Bug fixes

* `WatchQuery` learned to query against non-v1 API objects

Features

* `APIObject` learned to use JSON Merge Patch instead of JSON Patch
* `Deployment` and `ReplicaSet` learned `scale` method

Bug fixes

* `Job.scale` fixed to work as advertised
* `Pod.ready` learned to handle no conditions as empty conditions