[zendframework/zf2#5713] CS fixes
[zendframework/zf2#5713] CS fixes

- One argument per line on multi-line function calls
- @return self (instead of \Zend\Console\Getopt); performed throughout
  class for consistency
- Removed all @return void and @return null annotations
- Relative namespace qualification for all @throws annotations

Maks3w/zend-console,MadCat34/zend-console