TEAL: AC reserve auction contract

[stefdegroot]

Create and test a fully featured TEAL 6 contract of an auction with prices in ASA.

Features:

• Build with a single stateful contract
• Bidder pays the contract itself for individual shareholder claims
• backup bid repayment address in case of opt-out of the ASA
• claim functions for all shareholders
• configurable payout address
• configurable shares
• configurable reserve price
• configurable duration
• min bid increase protection (to prevent share division errors)
• snipe protection (min time to counter bid must be 30 min)
• close out as a separate function

Tasks:

• create TEAL contract
• test all TEAL routes on Testnet