add tuples and nested lists to config parser
add tuples and nested lists to config parser

ufal/neuralmonkey,bastings/neuralmonkey,bastings/neuralmonkey,juliakreutzer/bandit-neuralmonkey,juliakreutzer/bandit-neuralmonkey,ufal/neuralmonkey,ufal/neuralmonkey,bastings/neuralmonkey,juliakreutzer/bandit-neuralmonkey,juliakreutzer/bandit-neuralmonkey,juliakreutzer/bandit-neuralmonkey,ufal/neuralmonkey,ufal/neuralmonkey,bastings/neuralmonkey,bastings/neuralmonkey