added linear poisson neuron from paper 8 -abigail
added linear poisson neuron from paper 8 -abigail

git-svn-id: c3c03ae8de67eddb7d242ee89b936c58f5138363@123 e4a6332b-da94-4e19-b8c2-16eed22ecab5

tclose/NineMLCatalog,INCF/NineMLCatalog