Heavily redone the app

Implemented CocoaPods for dependencies, removed some views that were unneccessary for what I need, consolidated some views down, removed properties on objects, using getters from the Utils class, renamed Functions to Utils, implemented Core Data relationships to increase efficiency and the performance
Removed the views for the details of classes and assignments and put the details in the ActionSheet. Modified the About view so the content is below the navigation bar. Implemented back in the UMASD logo.