Comment 2 for bug 1453839

Now that https://pypi.python.org/pypi/jujubigdata is available, I'd like to switch to that instead of updating charmhelpers, as it will allow us to change our resources entry to this:

jujubigdata:
    pypi: jujubigdata>=1.0.0,<2.0.0

This will give us the ability to make backwards compatible bug fixes and improvements without updating all of the charms individually, and if we need to make a change that would break the existing charms, we can still do that by increasing the major version number, and then updating & fixing the charms, so that deployments of the older versions will continue to work with the older jujubigdata version.

IOW, it gives us much better control over our versioning and avoids excessive churn on the charms.