Updated submodules

Vend one of each item for every 1000 item sold

Now actually vends an item when random button is used

Fixed warning

Initial commit for random button effect

Fix potential bug, as we take a pointer to the buffer, so declare it as static

Scroll total number of dispensed beverages

Added link to blog post

Added missing function prototypes

Added VendingMachineImp as submodule

Disable resetMotors()

Fixed a bug when coins were restocked while the machine was on

Update todo

Update submodules

Wait a little when sending coins, so the full amount is tweeted