refine wordings
minor UI refine
Remove default scope of Car
1. show last 30-day comments
2. render car creator correctly
3. render car creator as "熱心車友" if there is no car_editions record found
4. new method of Car instance: creator, modifiers, editors
[TEST] Set config.assets.compile to TRUE.
Better descriptionS of car form
Merge branch 'develop'