style(everything): use parentheses next to a function name and a space before braces


AngularJS style guide and Google JavaScript style guide uses `function() {` and `function name() {`, not `function (){` and `function name(){` style.

This might be too trivial for a commit or too big for one pull request, I just thought about it reading through AngularJS sources and looking at "Contributing to AngularJS" document.