TUTORIAL SECTION UPDATE, ADDED STYLING TO ACTIVE UNIT IN DISPLAY

- Added Skip button in tutorial slides
- Added Done button on last slide
- Edited delete button
Merge branch 'master' of https://github.com/sparkrevolutions/arithmetick2

Conflicts:
	cordova/platforms/ios/www/javascripts/app.js.map
	cordova/platforms/ios/www/stylesheets/app.css
	cordova/platforms/ios/www/stylesheets/app.css.map
	cordova/www/javascripts/app.js.map
	cordova/www/stylesheets/app.css
	cordova/www/stylesheets/app.css.map