Fixed Goomba and player collision and also added a bounce

[GavinCopley]

Fixed Goomba and player collision and added a bounce when Mario touches the top of the goomba

Files Changed	Fixed Goomba Collision With Mario	Added Bounce When Mario Lands on Goomba
GameEnv.js	- Added variable "invincible" - Added variable "goombaInvincible"	- Added variable 'goombaBounce'
Player.js	- Remade collision detection with goomba - Now uses goombaCollision function when referencing Mario death	- Has function that subtracts 125 from y when variable is true
Goomba.js	- Makes Mario invincible after goomba dies to allow time for animation to play	- When Goomba is stepped on, changes variable to true
Other	- Commented out many 'console.log's in various files - Added Goomba changes to FlyingGoomba.js