quickstart instructions for starting from runpod (#5)

update readme w compat matrix

update readme

update readme

fix install to work with latest alpaca lora 4bit

4bit quantized support (wip)

cleanup, prep for 4bit quant support

config chooser, update readme instructions, device config, llama flash attention, debug out the labels, fix config key checks, other bugfixes

WIP for axolotl trainer

initial commit of README