Small fixes

[vieting]

These are some really small changes.

• The numpy random seed should be reset before each run just like the PyTorch random seed.
• tensor.new behaves different from tensor.new_empty when a tensor is passed as argument. I adapted that.
• Fix of small naming problem for the case that the root module contains parameters.
• One import was missing for the code of ModuleList.
• Added FloatTensor and fixed the args of LongTensor.