Change variables in Google Analytics script

`i` `s` `o` `g` `r` `a` `m` -> `a` `w` `e` `s` `o` `m` `E`

This code is generated with [isogram](https://github.com/shinnn/isogram) module, a GA code snippet generator written in JavaScript.
isogram is used by [Jekyll website](http://jekyllrb.com/), [gulp website](http://gulpjs.com/), [BrowserSync website](http://www.browsersync.io/) [and so on](https://github.com/shinnn/isogram#sites-using-isogram).