REFACTOR: Convert profile background uploader to be an ember component
REFACTOR: uploading avatar should share code with upload component
REFACTOR: Use common path for RESTful `DELETE` action from upload image
component
FEATURE: Can upload images to categories
FEATURE: Uploaded images to categories are shown when browsing
logo
custom Chinese translation
Fix Chinese translation: mdash
Translate faq zh_CN
Fix Chinese auto_track_topics
Fix Chinese translation: email.ok