Add skeleton of examples to be included with furious.

Add top level app.yaml, and simple example WSGI app.  This is sufficient
to allow testing from the dev_appserver's shell.
Convert example app.yaml to use include mechanism.

Add webapp WSGI app to webapp helper, and convert included app.yaml to
use bundled include-python27.yaml.
Fix path in include-python27.yaml to match any sub-url.
Adding travis.yml for Travis CI.
Test to trip off travis CI.
Updating Renaming travis config file.
Adding requirements.txt to the repo.
Adding GAE SDK to requirements.txt.  NOTE: Old Version.
Correct App Engine pypi package name.
Trying different SDK path.
Further tweaks to requirements to get the env setup.
Updating travis yaml to kick off a build.
Update travis yaml to trip build.
Update run tests to test travis ci.
Move run_job to processors module.

Refactor run_job into a processors module to better segregate that code
from the core Async object.  This code will grow into the core job
running logic.
Adjust get_current_context to raise error if not in context.
Add basic structure for callbacks to Async.

Callbacks will be used to specify actions to be performed at given
stages of execution.  This will likely be converted to a concept of
hooks as it progresses.
Clarify unit test docstrs and clarify test name.
Initial sketch of JobContext logic.

The JobContext is used to contain and expose the currently executing
Async object.  This is used to gain access to the Async without the need
to pass it around.
Adjust async run handler to use the JobContext manager.