Report week ignores weekends

### Before:
![zaznaczenie_003](https://f.cloud.github.com/assets/619324/1146171/38626a3a-1e4a-11e3-9125-240b57e39944.png)
### Now:
![zaznaczenie_004](https://f.cloud.github.com/assets/619324/1146172/39cf6f62-1e4a-11e3-95fa-8db0c0d85eb8.png)