Change workflow strings array to json

+ Use path to extracted string intead of index
+ Close #294
Install Honeybadger
Replace airbrake with honeybadger
Merge pull request #305 from edpaget/fix-workflow-string-extractor

Change workflow strings array to json
Merge pull request #307 from edpaget/honeybadger

Honeybadger
Allow refresh_token grants for all client types

+ Close #277
spec refresh token functionality
Merge pull request #306 from edpaget/refresh-tokens