BDIP11 (Formal vote): Increase bond supply by increasing max debt ratio

This is a formal proposal.

As per https://docs.basisdollar.fi/ProtocolParameters, this requires (among other things) a voting quorum of 20% and a minimum epoch length of 6 epochs (3 days).

Following the successful passing of the indicative vote on the following proposal below, this is now being put forward as a formal proposal.

https://gov.basisdollar.fi/#/basisdollar.eth/proposal/QmS6rQyRYvHhjWQp6Da7CaAAATVMgWpFyTm5wBU84hvymt

To recap the proposal:

There are no bonds presently available for sale. The system has hit its max debt ratio of 35%.

By increasing the max debt ratio, more bonds will be made available for purchase. To prevent splitting the vote, I have specified the increase as 70%.

Advantage:

1. Increasing the supply of bonds allows more BSD to be soaked up from the system.

Disadvantage:

1. During expansion, there will be an increase in the amount of BSD issued when the increased amount of bonds are redeemed.