Updated info on explorers and API

The primary block explorer now operate on the upgraded node:
https://chainz.cryptoid.info/eac/#!crypto

The backup block explorer now supports some new API calls, see:
http://explorer.eacpool.com/info

There is also a rest API integrated in the new wallet code, it can be enabled by adding the line
into the wallet config file. For usage of the rest API see documentation at:
https://github.com/Sandokaaan/EarthCoin2019/blob/master/doc/REST-interface.md

Explorer/API at http://api.deveac.com/ based on my code https://github.com/Sandokaaan/EarthCoin-API
is still broken due to some incompatibilities.