updated espnet version

Merge pull request espnet#847 from sw005320/fix_encoder_embed

Fix encoder embed

Merge pull request espnet#653 from espnet/kan-bayashi-patch-1

Update espnet version to 0.3.1 for the release

Merge pull request espnet#531 from simpleoier/wsj-mix-v.0.3.0

Wsj mix v.0.3.0

Merge pull request espnet#390 from kan-bayashi/fix/remove_duplicated_…

…snapshot

Remove duplicated lines

Merge pull request espnet#354 from sw005320/improve_librispeech

improve the librispeech recipe

Merge pull request espnet#326 from jnishi/sentencepiece-csj

Subword recipe for CSJ

Merge pull request espnet#245 from ShigekiKarita/python3-pytorch0.4fix

fix python3 pytorch0.4 errors

Merge pull request espnet#211 from Fhrozen/json

Json

Merge pull request espnet#202 from kan-bayashi/att_vis

Added attention visualization function