Update for SDK3.4 (works with 3.3 as well)

Remove pod type references

Update the matmul proportion

Removes unsupported (deprecated and unused) IPUConfig params from older configs (these will raise an error in latest build of Optimum Graphcore) (#3)

Update ipu_config.json (#2)

Update ipu_config.json (#1)

Training in progress, step 500

Model save