atomicswap-qt coins folder

What is this folder?

This folder contains coin file(json).

Add coins

If you want add coin to atomicswap-qt, you can pull request. I present the procedure.

1, Add to <coin name>.json
- json params explanation
  example json:
```
{
    "name": "Bitcoin",
    "unit": "BTC",
    "p2pkh": 0,
    "p2sh": 5,
    "bech32_hrp": "bc",
    "req_ver": 170000,
    "port": 8332
}
```
  - name params
    Coin name.
  - unit params
    Coin symbol.
  - p2pkh params
    Prefix of "pay to public key hash".
  - p2sh params
    Prefix of "pay to script hash".
  - bech32_hrp params
    Prefix of bech32 address.
  - req_ver params
    The version value that needs to be "signrawtransactionwithwallet".
    If all coin version doesn't need it, please set 99999999.
  - port params
    Please set default port number.
  - tx_ver params (optional)
    Tx Version. Default is "2". If coin can't use "2", please set number. For example, Koto needs set "4".
  - ver_id params (optional)
    Version Group Id. Koto needs this params.
  - sign_wallet params (optional)
    Sub params of req_ver. This params is bool type. If this params is true, all version coind use "signrawtransactionwithwallet".
  - path params (optional)
    Custom coin directory path. Please set for each OS(Windows, Darwin, Linux). For Example, MicroBitcoin needs this params.
2, Add coin icon to this folder. Please add coin icon.(png or jpg)
3, Add coin name to coin_list Please add coin name to util.py.