ASCTech/opic — pull request #6 by jamespaulmuir (2012-12-20 20:31:03+00:00)
Title: Provides the "nearest" available size of Opic instead of giving a 404

It would be nice to have the flexibility to include images of sizes inclusive of 50-400, this might be a good solution rather than generating each size on the fly

```ruby
[400, (width.to_f/50).ceil * 50].min
```

12 => 50
102 => 150
1000 => 400