Document JSON support (issue #488)

Signed-off-by: Michal Čihař <michal@cihar.com>
Merge branch 'master' into bootstrap
Smaller comment editor

Signed-off-by: Michal Čihař <michal@cihar.com>
Machine translation processing

Signed-off-by: Michal Čihař <michal@cihar.com>
Nicer loading icon for machine translations

Signed-off-by: Michal Čihař <michal@cihar.com>
Translation page should be done

Signed-off-by: Michal Čihař <michal@cihar.com>