Merge branch '1.6' into dev

.gitignore

app/lib/common-libs/parsers/transaction.ts

app/lib/common-libs/txunlock.ts

app/lib/dto/TransactionDTO.ts

app/lib/indexer.ts

app/lib/rules/global_rules.ts

app/lib/rules/local_rules.ts

app/modules/bma/index.ts

app/modules/crawler/lib/sync.ts

doc/Protocol.md

gui/index.html

package.json

release/arch/debian/package/DEBIAN/control

release/arch/windows/duniter.iss

test/fast/modules/common/grammar-test.js

test/fast/modules/common/grammar.ts

test/integration/branches.js

test/integration/crosschain-test.js

test/integration/transactions-csv-cltv-sig.ts