A simple trainer class for pytorch with tensorboard support

## Base class for training pytorch models

### Visualize prediction dynamics:

""visualize prediction dynamics. I like to visualize model predictions on a fixed test batch during the course of training. The “dynamics” of how these predictions move will give you incredibly good intuition for how the training progresses. Many times it is possible to feel the network “struggle” to fit your data if it wiggles too much in some way, revealing instabilities. Very low or very high learning rates are also easily noticeable in the amount of jitter."" - http://karpathy.github.io/2019/04/25/recipe/

## sanity checks:

1. check loss reduces on a fixed data samples (say 1 or 2 inputs) by iterating

## Project details

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