Update czech client translation

* translates new strings
* adds typographic chars such as proper quotes, hellip, dashes and thinspace where appropriate
* translates `@name ` to `@jméno`
* also changes `vrátit do původního nastavení` to `původní nastavení` which is less clear but fits better:
![Before](https://f.cloud.github.com/assets/192200/1556335/34fad80a-4ec9-11e3-87a1-1a76f7ea3839.png)
![After](https://f.cloud.github.com/assets/192200/1556336/36a1855a-4ec9-11e3-90f5-81132a64ab2d.png)