update dynamic threshold percentile to 0.95, given @jacobwjs reportin…

…g it is better

complete inpainting using Repaint https://github.com/andreas128/RePaint

fix fp16 and encoding raw text during training issue

use custom layernorm class instead of F.layer_norm

do not force softmax in float32

add an assertion, update readme

add auto random splitting of validation set from training set, allow …

…for researcher to pass in dataset with batch size

take a chance with cosine sim attention and rely on the public to cro…

…wdsource its validity

make sure to load exponentially moving averaged version of unets if a…

…vailable