2516 lines now. Some day I promise a release will make it smaller.

• float16 support (needed for LLaMA)
• Fixed critical bug in training BatchNorm
• Limited support for multiple GPUs
• ConvNeXt + several MLPerf models in models/
• More torch-like methods in tensor.py
• Big refactor of the codegen into the Linearizer and CStyle
• Removed CompiledBuffer, use the LazyBuffer ShapeTracker