Merge pull request #16 from Azure/master

Merging release 1.0.0 from master to dev
Added config.customize method to do after-creation customizations.

This will support things like the azure submodules adding config helpers
without the common module knowing ahead of time what the config info is.
Return this from customize for chaining.
Merge pull request #17 from christav/after-the-fact-customizer

After the fact customization
Updated version #