Refactored code to a multi-module project
Add dropwizard-metrics-datadog module

Added dropwizard-metrics-datadog module to support dropwizard
configurations for dropwizard 0.7.x projects
Included directions in README
Fixed some formatting issues
Merge pull request #17 from bazaarvoice/coursera-master

Adding support for dropwizard 0.7.X configuration files