Zoe PRs

[katelynsills]

Here are the stacked PRs for Zoe in order from bottom to top:

• Add Seat Mint Add Seat Mint ERTP#122
  - This is waiting for more documentation on exactly how the generator function solution works.
• Add "areRightsConserved" and "isOfferSafe" functions with tests Add "areRightsConserved" and "isOfferSafe" functions with tests ERTP#123
• Add Zoe and Basic Contracts Add Zoe and Basic Contracts ERTP#125
• Add Autoswap (Uniswap) Add autoswap (uniswap) ERTP#136
• Swap with Invites (essentially a covered call) Written but needs to be made into a PR

Note: add getTotalSupply() method Agoric/ERTP#135 has been closed because getTotalSupply is not going to be used by Autoswap. The functionality is still useful as a different kind of mint configuration, so there's a new branch that should have a PR after our generator function discussion has been sorted out.

[katelynsills]

Closed for restructuring

[warner]

in the old repo. this was ERTP issue 134