README.md requires minor update

[iorhythm]

Hey there,

currently the readme.md suggests the following command to train a model:

python train.py --name mytraining --steps 10000000 --batch 16 --lr .001

however the option --lr .001 throws the error:

train.py: error: unrecognized arguments: --lr 0.001

To fix this, I ran

python train.py --name mytraining --steps 10000000 --batch 16 --start-lr .001

Hoping this helps

St