Features/secrets config file

Hi emsearcy,

I did a bit of housecleaning and added the secrets file option.
Also updated and improved README and converted to markdown format.

Let me know if you prefer to just pull the secret file changes and I will create a branch for you to pull. But if you don't mind the tidying, readme and version stuff I've done, here it all is!

I've tested it for a couple hours on my server and is all running fine. I will test it further for another week or two. Feel free to give it a test too before you accept anything.

Regards,

Jason