* ERC20BridgeSampler: Sample Curve Buy * Fake Buy Kyber/PLP * Deploy mainnet * Add Kyber rates for buy tests * CHANGELOGs * Provide maxIterations and targetSlippage as options * Cleanup ERC20BridgeSampler for re-use * Redeploy Mainnet Kovan * Feedback fixes * Handle OOG/revert 0s * Redeploy Mainnet refactor