Archive repository and update README content

problem: inputs on the Receive screen do overlap each other

problem: error when editing an allowance for a token not in registry

solution: start v2.13

solution: release v2.12.0

Merge pull request #1395 from emeraldpay/fix/no-tx-history

problem: tx history not updated

problem: tx history erased on each update

Merge pull request #1394 from emeraldpay/fix/forgets-coin-source

problem: errors in console when there is no rate for a coin

problem: tx screen forgets coin source

Merge pull request #1393 from emeraldpay/fix/no-transactions-screen

problem: no transactions screen

Merge pull request #1392 from emeraldpay/feature/coin-control

solution: control the order of UTXO to use for a transaction