Fixed wrong quiz structure
db + http refactoring (wip)
Ended db base api + tests
Moved sinon.js outside browserify
Refactored and tested http module
Made offline detection compatible with IE/Safari
Used better export style
Changed returned value to preserve key original type
Made #getTraces throw a custom error if no traces are available
Changed http errors to custom errors functions
Added basic backend app
Syncer draft (wip)
Exit before request when offline
Added missing content type header
Reorganized backend using express
Removed unused modules
Syncer draft
Used proper error objects when promise rejects
Added fallback message if passed error is falsy
Removed persister draft