Merge pull request #287 from thriuin/master

Changes for commenting and rating
Merge pull request #288 from thriuin/master

Ensure dataset page only shows comments in the current language
fix login failure failure
fix dataset rating off-by-one
Merge pull request #289 from wardi/master

fix login failure failure; dataset alt text off-by-one error
correct "unified resource format" for jpeg 2000
Merge pull request #290 from wardi/master

correct "unified resource format" for jpeg 2000
Update README.rst