adding python helix admin library

[jheise]

This adds a python wrapper around the admin webapp.

functions.py - handles all communication with the webapp.
cluster.py - creates an abstraction of a cluster
helixexceptions.py - exception objects
participant.py - handles all information about a participant
partition.py - handles all information about a partition inside of a resource group
resourcegroup.py - handles information about a resource group

[kanakb]

Can you add the following block to the top of each file:

#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.
#

[jheise]

Just added the license

[kanakb]

LGTM, merged

[asfbot]

kishore g on dev@helix.apache.org replies:
can we put the docs as README.md in this folder?

[kanakb]

Generating pydocs should be sufficient. The classes and methods look like they're sufficiently commented to automatically generate those.