LeagueProjectile: Added a field for skillName, which will later constrain some of the parameters of the object depending on what skill the person would like to practice.

main: Added a main class in case I need it in the future. Easier to find starting place in program.

mainWindow: added skillName static variable, changed running FPS to ~30 from 10.

openingWindow: Added a beginning window for multiple actions. Get updates, give skill to practice, get previous scores, and start.
Changing naming of classes to be consistent with Java class names.