added a way for user to kill program via text input.  added a method of allowing user to select class, need to eventually improve to the main menu's terminal like input.  made it so all user input is automatically set to lower case, so no issues will arise with casing.  also incorporated a psuedorandom way for users to choose from current classes.  Fixed a few minor spelling mistakes.  Created some variance in drops, will definitely be working on more.  Also changed some data values for the sake of balance.