Update Hebrew translation
Update Japanese translations
Add license to the top level directory.
Revise Russian translation of word 'repository'
Merge pull request #616 from fadils/master

Update README.md
Merge pull request #617 from 183614956/master

Revise Russian translation of word 'repository'
Merge pull request #534 from Blei/license

Add license to the top level directory.
Merge pull request #478 from crazymaster/ja

Update Japanese translations
Merge pull request #474 from arthurzam/master

Update Hebrew translation