Supply increase/decrease concordant with EIP 621

[GNSPS]

I think

https://github.com/ConsenSys/curationmarkets/blob/master/CurationMarkets.sol#L63
&
https://github.com/ConsenSys/curationmarkets/blob/master/CurationMarkets.sol#L97

could be concordant with ethereum/EIPs#621 and contribute momentum to help push the standard further (given the groundbreaking potential these contracts have for innovation 👏 ).

[simondlr]

Oh yeah. Hmmm. Good point. Very good point!