Megumin4an

We use a coin and a blockbook for the PIVX coin. The startup configuration is as follows: `./blockbook -sync -blockchaincfg ./coin.json -internal 0.0.0.0:${BLOCKBOOK_IPORT} -public 0.0.0.0:${BLOCKBOOK_EPORT} -logtostderr -dbmaxopenfiles 80000 `