updated .gitignore; added PolynomialField
updated PolynomialField
exposed fields in PolynomialField
added polynomial model
exposed data instead of textfields in PolynomialField
added MainView and MainController
added listener to PolynomialField
added table and space for graphs
added error-checking to KeyListener

should be changed in the future to a JOptionPane probably
changed from panPolynomials.add() to view.addPolynomialField
working auto-add PolynomialField
renamed Polynomial and Nomial to ProjectInput and PolynomialItem respectively