Merge pull request #3 from acourtneybrown/master

Obtain ObjectMapper from the Dropwizard Environment
Merge pull request #4 from acourtneybrown/master

Register the ObjectMapper singleton obtained from Dropwizard's ObjectMap...
Upgraded Dropwizard to 0.7.0
Merged Dropwizard 0.7.0 changes from gcadien
Merge branch 'gcadien-master'