Merge pull request #6 from jiangxiaoli/dev_Xiaoli

Update README.md
added turnCrank() logic (no coins yet) - just tap/spacebar and crank turns+decrement gumball count
Merge pull request #7 from jiangxiaoli/dev_Jenn

added turnCrank() logic
gumball machine class turncrank/dispense
Merge pull request #8 from jiangxiaoli/dev_Jenn

gumball machine class turncrank/dispense
just a test, will remove later
remove test file
Merge pull request #9 from jiangxiaoli/dev_sammie

Dev sammie
add Coin, quarter, dime, nickel class
Merge pull request #10 from jiangxiaoli/dev_sammie

add Coin, quarter, dime, nickel class
add 3 coins to world, added refill on GM
Merge pull request #11 from jiangxiaoli/dev_Jenn

add 3 coins to world, added refill on GM
remove Quarter, Dime and Nickel classes
Merge pull request #12 from jiangxiaoli/dev_sammie

remove Quarter, Dime and Nickel classes
make constructor for Coin class
Update Main.java
revert coin/main
Merge pull request #13 from jiangxiaoli/dev_Jenn

revert coin/main
Merge pull request #14 from jiangxiaoli/dev_Xiaoli

Models - Coin
add gumball class, add makegumball to actionlistener