* #12 Add support for key `<Delete>`/`<Home>`/`<End>` * Only enter raw mode as needed (calling `Readline()`), program will receive signal(e.g. Ctrl+C) if not interact with `readline`. * Bugs fixed for `PrefixCompleter` * Press `Ctrl+D` in empty line will cause `io.EOF` in error, Press `Ctrl+C` in anytime will cause `ErrInterrupt` instead of `io.EOF`, this will privodes a shell-like user experience. * Customable Interrupt/EOF prompt in `Config` * #17 Change atomic package to use 32bit function to let it runnable on arm 32bit devices * Provides a new password user experience(`readline.ReadPasswordEx()`).