- higher game rounds give more score per field
- pass some info into the player contract
- allow contracts to sit out a turn and not pay gas

- remove frontend sort - players are now sorted in the contract
- remove interactivity - turns are externally triggered
- call new `isRunning` contract method

Game should be enable when all fields are painted. No more turns are
valid then.

- `submit_turn` does the turns for all players now
- A new round is only started after this message was called (not after
each block)
- Everyone can call this message but we will also just submit it in a
loop so the game just keeps running
- Added e2e test that just runs through the happy path of playing a game
with two players

We just want to make sure that once player uploaded their contract we
are not dependent on them submitting transactions. They can just watch
their contracts fighting it out.