Lab 3: Tip-Jar

Create a solidity program that accepts ETH from anybody (using a fallback function), but only the creator of the contract (the owner) can withdraw it. Your submission should be the solidity program.

Use the remix IDE, as described in the previous exercises: overflow and coinflipgame
Verify that depositing to the tipjar by setting a value and clicking the (fallback) button decreases the balance of the sender:
Verify that an account other than the owner cannot withdraw:
Verify that the owner can withdraw the tips.
Optional: In your contract, have a function that allows the owner to transfer ownership to another address.