Update storage-quickstart.rst

Need to delete key before deleting bucket.
Update storage-getting-started.rst

Should be "Google Cloud Storage" here, not "Datastore".
Fix link to example script.
Fix link to example script.
Add 'setup.cfg' to allow persistent configuration of nose options.
One extension per line.
Automate testing supported Python versions, coverage, Sphinx docs w/ tox.
Get all testenvs running under tox.
Drop use of setup.cfg.

Pass coverage-related args to nose explicitly.
(Really) pass coverage-related args to nose explicitly.
Convert commented line to a TODO.
Merge pull request #127 from tseaver/expand_testing

Set up local machine test automation with tox.
gcloud.connection:  57% -> 100% coverage.
gcloud.credentials:  0% -> 100% coverage.
Refactor test jigs for reuse.

Also, back out the class-level knob for testing;  prefer instead a
controlled monkey-patch of the module.
gcloud.datastore:  40% -> 100% coverage.
Normalize w/ gcloud.connection.Connection.
gcloud.datastore.connection:  27% -> 52% coverage.
gcloud.datastore.connection:  52% -> 61% coverage.
gcloud.datastore.connection:  61% -> 72% coverage.