Added the ability for ActionTriggers to act on nodes taht have multiple actions of the same name.

Change-Id: I58a267fec192d56eae56d10b4f4e2e78dc0e96b4
Cleaned up the neural XOR and OR unit tests. Also fixed the ActionTriggerXor3InputTest unit test which was failing due to lack of consideration for backpropagating bias neurons.

Change-Id: Ia8e3f0db8e18579a164bcb1dde58e6968e64f814