Update README.md
Merge remote-tracking branch 'origin/gh-pages' into gh-pages
Merge branch 'master' into gh-pages
Merge branch 'dev' into gh-pages
Merge branch 'dev' into gh-pages
Merge remote-tracking branch 'origin/gh-pages' into gh-pages
Merge branch 'dev' into gh-pages
Merge branch 'dev' into gh-pages
Clean up code.
Update docs and clean up code format.