A Physical HID proxy

So we have an Android phone running some security-sensitive software, as a prototype. Part of the software is that is has to "pretend" to be a keyboard on a computer. An Android phone can't do this without the kernel being recompiled. This project gets around that limitation by using a USB=>FTDI cable connected to an Arduino running V-USB HID, which sets itself up as a keyboard. Every SerialEvent, V-USB's keypress command is called. Thus, every character over serial ends up being typed, which is a hack, but works ;)