Applied CS Fixer to everything

Have applied the PHP CS Fixer (https://github.com/fabpot/PHP-CS-Fixer)

Please have a quick look - we can customize this (e.g. do we want to align our doc parameters?)

`````
phpcsfixer fix --fixers=encoding,linefeed,indentation,trailing_spaces,unused_use,php_closing_tag,return,visibility,short_tag,standardize_not_equal,spaces_cast,new_with_braces,object_operator,extra_empty_lines,function_declaration,braces,lowercase_keywords,include,lowercase_constants,psr0,controls_spaces,elseif,eof_ending -vvv .
`````