Added utilities service and created two functions.

Module is integrated into tdf. This module contains two functions:

* spliceByProperty: Deletes all objects in a given list that have a
  matching property.
* spliceByObject: Deletes all objects in a given list that match a given
  object.

All controllers that delete something then remove the deleted something
from a list have replaced the logic with a call to this utilities
service.
Changed ugly js confirm to angular modal.

Change occured to confirm deletion of agent or reset of agent's trades.

Change included upgrade to angular 1.2.0-rc.2 (rerun npm install).

Also included services/utilities.js which was missed in last commit.