Code cleanup; In-app field definition added

App will now pass JSHint validation upon upload.

Added an in-app setting for entering the user field ID to use for
storage.
Generalized requests and integrated setting

Removed specific domain and user information from requests.

App will also use its field key setting instead of a hard-coded field
key.
Merge pull request #1 from buheryfi/clong

Add field setting functionality and generalized requests