added i18n, removed <pre>-Tags in go.php, deleted go.sublime-project

### Added i18n
See go.php and sgf.php for changes.

Created a simple form in the backend to switch language of wgo.js. Using the basic i18n-hooks. Further  added i18n.*.js files shiped with wgo.js

Tested and works fine on my WP 3.9.1 Installation

### pre-Tags
Removed  pre-Tags in the go.php. They were without any use, and used the wrong way.

### go.sublime-project
Deleted this file from project according .gitignore