Created manage goals interface.

Created the table layout for editting and updating the goals.

- Need to create the javascript to wire up the accounts changing and
  deleting of goals.
- Should also consider making edit boxes for the amount and/or name of
  the goal, but that can come later
toggle goal account api endpoint.

Also updated docs for goalservice to include the getGoal function.

Created the toggle-goal-account endpoint to handle linking and delinking
goals to various accounts.
Delete goal endpoint + js.

Delete goal php api endpoint to remove goals from the management screen.

Added javascript to toggle and delete goals and make the entire
management function.