Implemented DataUploader class

App can now send data to server in JSON format.

 Send data to API #17
Cleaned up code a bit
Fixed Time String

Changed time value given in json string packet to actual string
Converted Time to use Joda time instead

Fixes previous implementation's issues prodicing date string
Deleted one obsolete dependency

There was an include statement that wasn't needed
Merge pull request #18 from PedalPortland/upload

Works great. Nice work.