Inline-comment configuration is call-order-sensitive

The following will not enable inline-comments:

```ruby
chikuwa.report build_log_filename
chikuwa.inline_mode = true
```

but this will:
```ruby
chikuwa.inline_mode = true
chikuwa.report build_log_filename
```

So it seems that `chikuwa.inline_mode = true` needs to be first in call-order in order to work, but it's not made clear in the documentation.