Qualia-plugin-snn

Bug fixes

- QuantizedIFNode/QuantizedLIFNode: return correct round mode for membrane potential and hyperparameters for Qualia-CodeGen.

Bug fixes

- LearningModel SResNet/QuantizedSResNet Fix using 2D layers.
- PostProcessing EnergyEstimationMetric: Fix display of message when non-binary inputs/outputs are included in the total.

Other changes

- Some refactor for quantized layer inheritance.

Initial release of Qualia-Plugin-SNN.