phpdoc fixes

cleaned up too many spaces and no new line before return in actioncomponentinterface

By the way could you let me know if you are interested in those pull requests or not. I'm trying to understand this library (I don't like magic and I'm building some more functionality on top of it)

Also it helps me in learning some git commands.

But most of my fixes are just phpdoc fixes (in PHPstorm there are a lot of 'warnings' (lines under methods) if the phpdoc is wrong. If you'd rather not have pull requests for those I won't bother you with them anymore :wink: