This crate does not work on different keyboard language layouts

[lucascompython]

Due to the way symbols are sent a "uppercase" "0" in the default keyboard layout equals to ")" but in Portuguese layout for example it equals to "=". Also I've found a bug, not sure if it is because of the keyboard layout but when running the example in the README the program wouldn't stop typing, because the "!" character is just an upper-cased 1 so the bind calls itself.