Finished translating into czech

Hello,

I'm including (hopefully) the last batch of czech I18n fixes. And a question (so this pull request is not so boring):

Do you see anything wrong with this particular piece of `default.cs.yml`?
```yaml
cs:
  attributes:
    defaults:
      pages:
        index:
          title: "Úvod"
          body: "Obsah úvodní stránky"
        "404":
          title: "Stránka nebyla nalezena"
          body: "Obsah stránky 404"
        other:
          body: "{% extends 'parent' %}"
```

Because I'm still getting `translation missing` (as the default pages titles):
![snimek obrazovky 2013-08-12 v17 50 13](https://f.cloud.github.com/assets/352464/948395/f422b81e-0366-11e3-86d4-1af05ccac361.png)