Add script to load a project directory with standard Scheme auto-completion.
Project 0: executing simple Scheme commands.
Project 1, problem 1: Position function
Project 1, Problem 2: Basic quadratic roots functions
Project 1, problem 3: Flight time functions.
Project 1, problems 4 and 5: finding the optimum launch angles
Project 1, problem 6: Travel distance including the effects of drag.
Project 1, problem 7: find the shortest throwing time for a given distance and initial velocity by searching through all possible angles