Add docs for kazoo + zake usage for those that are interested

Add a description and link to the zake library (and its repo)
for those that want to test kazoo client-level functionality without
having to setup a full zookeeper runtime to accomplish this.

Part of #198
Update basic_usage.rst

Added documentation for the optional logging setup needed for the clients.
Add lost colon
Merge pull request #204 from rocco66/master

Add lost colon
Merge pull request #202 from abhirajbutala/patch-1

Update basic_usage.rst and mention logging setup.
Add changelog entry for #181/#202.

Also change the link to have a descriptive name instead of `here`.
Merge pull request #200 from harlowja/master

Add docs for kazoo + zake usage for those that are interested
Tweak Zake description and add changelog entry, closes #198.
Start testing against Python 3.4 and update to gevent 1.0.1.
Document Python 3.4 instead of 3.2 as a supported version.

We never ran automated tests against 3.2, so the support wasn't really
there.

As a general policy it seems reasonable to support the last two major 3.x
releases at a time.
Optimize test skipping for ZK 3.4 only tests on travis.

We repeatedly got timeout errors in server_version calls. On travis we
know what version of ZK was started using the environment varibales.
In a non travis environment we continue to use the server_version calls.
Separate authentication related tests from the rest.

Use an isolated per-test client for authentication related tests.
This should help avoid errors in test teardown trying to recursively
delete all nodes using `self.client`.
prepare release
vb