Switch to Lasagne

[MartinThoma]

Currently, the hwrt project uses an internal, non-public toolkit for training / testing networks. This should be changed to https://github.com/Lasagne/Lasagne

Steps:

• Change pfile code to HDF5 files
  • bin/train.py
  • bin/test.py
  • hwrt/create_pfiles.py
• bin/train.py
• bin/test.py
• bin/convert.py

Choice of feature format

The intermediate pfiles should be changed to something more common like

• Numpy arrays: + Quite convenient for Python programmers, documentation
• HDF5: + Already used for model files

I think HDF5 is the better option as it is possible to store the feature vector X and the label vector y in the same file.