Skip Thought Vectors (http://arxiv.org/abs/1506.06726) example Dilated convolution support Nesterov Accelerated Gradient option to SGD optimizer MultiMetric class to allow wrapping Metric classes Support for serializing and deserializing encoder-decoder models Allow specifying the number of time steps to evaluate during beam search A new community-contributed Docker image Improved error messages when a tensor is created with an invalid shape or reshaped to an incompatible size Fix bugs in MultiCost support Documentation fixes [#331]