Added Scales, Note Selectors and Icons

What's Changed

• Adding basic scale functionality by @leouofa in #37
• Adding Major and Minor scales by @leouofa in #38
• Setting up the scales page by @leouofa in #39
• Adding note selector & loading screens by @leouofa in #40
• added fav icons by @leouofa in #41

Full Changelog: 1.0...1.1