Merge pull request #219 from apkar/master Release 1.8.3

Update CHANGES.md 

Update Dockerfile 

Update CHANGES.md 

1.7.2 release notes. (#187) 

Merge pull request #183 from dongxinEric/release/1.7.1 Release notes for 1.7.1

Release notes for 1.7.0 (#172) 

Merge pull request #142 from apkar/release-notes Adding release notes for 1.6.4

Adding release notes for 1.6.3 (#102) 

Merge pull request #65 from apkar/master 1.6.2 release notes.