Merge pull request #626 from brucefan1983/3.9.4

3.9.4

Merge pull request #615 from brucefan1983/393

3.9.3

Merge pull request #598 from brucefan1983/brucefan1983-patch-1

Update README.md

Merge pull request #526 from brucefan1983/release_3.9.1

to release v3.9.1

to release v3.9

Merge pull request #459 from brucefan1983/release_3.8

prepare for 3.8

ready for releasing 3.7

Merge pull request #361 from brucefan1983/multiple_loss

Multiple loss

remove unused file

to release version 3.4.1