* Fix: Resolved conflcit between "live" and "test" zaps which could cause data to not be sent correctly through the Zap once configured.
* Fix: Prevent the word "false" from being passed within blank data lines (like the Address Line 2 field).
* Tweak: Refactored settings class to use new Settings API within Give core.
* Tweak: Removed old hooks for 2.1+ compatibility.
