Re-order config entries to add logical groups
Tweak a few config names / env vars
Also watch out for trailing slashes on publicUrl
Clean up urls before deriving values from them
Update config.js to be consistent
Make both personaUrl and publicUrl strict URLs
Nest configuration parameters
Remove common prefixes, tweak env var names
Update references in config.js
Use the new, hierarchical config names
Rename locale.default, avoid confusing convict
Update README.md
Update README.md -- statsd is off by default
Merge pull request #99 from mozilla/config-cleanup

Config cleanup