add gitignore && licence && version when all api call done.

minimum order: [{"currency":"BTC","limit":"0.0005"},{"currency":"ETH","limit":"0.02"},{"currency":"COSS","limit":"25"},{"currency":"XRP","limit":"5"},{"currency":"USDT","limit":"2"},{"currency":"TUSD","limit":"2"},{"currency":"USDC","limit":"2"},{"currency":"GUSD","limit":"2"},{"currency":"USD","limit":"2"},{"currency":"GBP","limit":"2"},{"currency":"EUR","limit":"2"},{"currency":"DAI","limit":"2"},{"currency":"COS","limit":"25"}]