move `util/makews.js` to new `bin/` directory

Because of the existence of `util.js`, having `makews.js` in `util/` makes it awkward for tab completion and is confusing.
add `--force` arg to overwrite with `makews.js`
generate working exercises with `makews.js`

Use `workshopper-exercise` for `exercise.js` export.
update bundled example exercises

Working examples generated by `makews.js`.
Merge pull request #72 from khalifenizar/master

Generate working exercises with `makews.js`
Extracted argv._[0] to cmd variable
Changed to commonly used "mode" instead
Extensive translation integration
Fixed formatting issues and added missing translation
Changed the formatting
Changed back to english
Added language submenu to select the language
Extracted i18n methods to own file
Moved more language logic to i18n
Put the assertion for folders in the utils because its distracting when reading the code
Made sure always 'this.lang' is used instead of lang
Fixed missing local method
Code cleanup
Code formatting
A little more cleanup