A fork of the Arduino SoftwareSerial which is hard-coded to use 2 stop bits.
This is useful for interfacing with the HP 34401A, which requires 2 stop bits.
The demo/ folder includes a sketch which implements an external LCD
display for the HP 34401A. See also https://gist.github.com/cellularmitosis/1582236f226e9d98075a0c971eb4168c