implement game-master that influences co2 levels according to temperature

[johannbarbie]

Earth has an unlockCO2 function. Air has a lockCO2 function.
expected behaviour:

• when the temperature is below 1.5 degrees, the gamemaster should lock a certain amount of CO2 from the air periodically.
• when the temperature is above 1.5 degrees, the gamemaster should unlock a certain amount of CO2 from the earth periodically.

Scope:

• write a webservice that will send transaction regularly.

Delivery:

• code
• tests
• testnet deployment
• mainnet deployment

Roles:

• gardener: @johannbarbie | 10%
• worker: name | 70%
• reviewer: name | 20%