Update docs

[andrewjstone]

There are a bunch of incorrect links. Also, since rust 1.15, rabble no longer requires nightly.

[dpezely]

If it's not too much to ask, please add a complete example.

Code snippets in the User Guide are enough to convey the concepts, but as someone still crossing-over to Rust from Erlang, C, Common Lisp, etc., it wasn't enough to get it working.

While there's an instance of Rabble used within haret, there's much to grok of its system design before being able to distill an MVP/example of Rabble.

Thanks for everything you've done!

[andrewjstone]

@dpezely Thanks for looking at rabble. Honestly I'm pretty swamped, and am not sure when I'll have the time to do this in doc form, although I agree it's a good idea. There is a complete end-to-end example in the tests though which should give you all you need. Feel free to ask me specific questions about it. I'm sure to tell you things I dislike about my own solutions. 😆 It's safer to go with this example as well, as it actually compiles and runs. https://github.com/andrewjstone/rabble/blob/master/tests/multi_node_chain_replication.rs

[dpezely]

Thanks! I'll explore that test further.