Feature: DEX

[attogram]

A distributed exchange for PHPCoin.

Prereqs:

• WPHP - Wrapped PHP. Contract and dapp frontend. Maybe a port of ethereums weth contract?
• at least 1 other token, so we can make a pool

Setup:

• contracts for dex manager and pools. Maybe a port of uniswap v2 contracts?
• frontend dapp - for trading, for liquidity management