[enh] Add auto-logout (use the lib ng-idle)

bower.json

doc/configuration.md

scss/ionic.app.scss

www/css/ionic.app.css

www/css/ionic.app.min.css

www/i18n/locale-en-GB.json

www/i18n/locale-en.json

www/i18n/locale-fr-FR.json

www/index.html

www/js/app.js

www/js/controllers/app-controllers.js

www/js/controllers/settings-controllers.js

www/js/controllers/wallet-controllers.js

www/js/services/settings-services.js

www/js/services/utils-services.js

www/lib/ionic/js/angular/angular-idle.js

www/lib/ionic/js/angular/angular-idle.map

www/lib/ionic/js/angular/angular-idle.min.js

www/plugins/es/js/controllers/invitation-controllers.js

www/plugins/es/js/controllers/message-controllers.js