moved adjust weights code into neuron link

we can now reuse the backprop neuron in quickprop
Merge branch 'master' into arch

Conflicts:
	backprop/backpropneuron.cpp
	backprop/backpropneuron.h
	backprop/backpropneuronlink.cpp
	neuron.cpp
	neuron.h
	neuronlink.h
	quickprop/quickpropneuron.h
	quickprop/quickpropneuronlink.cpp
	quickprop/quickpropneuronlink.h
remove unused quickpropneuron.h
uncomment sinus regression test
rename rawErrorValue to errorValue and errorValue to gradient
Merge pull request #3 from emmanuel099/arch

Arch