Key bindings conflict with Flycheck

Your key bindings at `C-c !` conflict with [Flycheck](https://github.com/lunaryorn/flycheck), which uses `C-c !`, too.

Would you mind to change your bindings to `C-c &`?

**Disclaimer:**  I am the author of Flycheck and obviously biased :), so please just choose to ignore this report if you want to.