A better README

[X-Ryl669]

Just found out your project in pypush's issues. However, it's very arcane as it is.

Can you improve the README so it explains:

1. What it tries to achieve
2. Its current state
3. How to use it
4. What's missing for full functionalities
5. Its links with the other related project (like anisette server, pypush, FindMy, ...)

Thanks!

[cameronaaron]

#12