Update README and fix another i18n bug

* added info how to set the theme to :default or :wide
* change a transtaltion in _menu
Merge pull request #13 from andywenk/update-readme-and-fix-translation

Update README and fix another i18n bug
Version bump to 1.2.1
generate gemspec
Merge branch 'master' of github.com:melvinsembrano/cms-fortress
updated Gemfile