WIP: support Ellaism

[hackmod]

Description

add Ellaism (ELLA) support

• Homepage: https://ellaism.org/
• Block Explorer : https://explorer.ellaism.org
• API node: https://jsonrpc.ellaism.org
• BIP44 163 ( BIP44: Add Ellaism to the registered coin types satoshilabs/slips#125 )
• Chainid 64 (https://chainid.network/)
• Ticker: ELLA
• CMC: https://coinmarketcap.com/currencies/ellaism/

Testing instructions

./bootstrap.sh or make -C build tests

Types of changes

Ellaism support added

Checklist

• Add tests to cover changes as needed.

cc: @ellaismer @limax

[codecov]

Codecov Report

Merging #418 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #418   +/-   ##
=======================================
  Coverage   82.38%   82.38%           
=======================================
  Files         239      239           
  Lines        5500     5500           
=======================================
  Hits         4531     4531           
  Misses        969      969

Impacted Files	Coverage Δ
src/Coin.cpp	77.5% <ø> (ø)	⬆️

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