Adapt category helper to multilingual content
Adapt category helper to multilingual content

The category information will be obtained from the `categories` data
file. This file is the same the category generator uses.

Built from 6574fcc3db6619d5dbfb0fec3f34792c8357962f.

ahaasler/hexo-theme-colos,ahaasler/hexo-theme-colos