Make config files more readable when "cat"

To avoid this:
```
xcp@ubuntu:~$ cat .config/counterpartyd/counterpartyd.conf
[Default]
backend-rpc-connect=localhost
backend-rpc-port=8332
backend-rpc-user=rpc
backend-rpc-password=1234
rpc-host=localhost
rpc-port=4000
rpc-user=rpc
rpc-password=xcppw1234xcp@ubuntu:~$
```
Merge pull request #139 from rippler/patch-14

Make config files more readable when "cat"