Restructure ML Training Procedure to allow for any Combination of Regularizer.

[holzhauk]

• Restructure Training Procedure into Classes
• Implement Regularizer as abstract decorator
• Implement Jacobian Reg
• Implement Spectral Reg
• Test Jacobian and Spectral Regularisation against legacy code
• Implement L2 Reg
• Update Abstract Model Class
• Create Architectures module and separate code from LocalLearning module
• Put SpectralReg Model into LocalLearning Architecture one