Fixed psr2 violation: There must be one blank line after the last use statement; two found

![bildschirmfoto 2014-09-21 um 15 37 39](https://cloud.githubusercontent.com/assets/2072185/4348613/83c0b8b0-4194-11e4-87f1-5ed7614c73a1.png)

There's one blank line two much after the use statement and before the php doc of the class definition.

See psr2: `There MUST be one blank line after the namespace declaration, and there MUST be one blank line after the block of use declarations.` (https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-2-coding-style-guide.md)