
Replace "master" with "controller" and "slave" with "peripheral" in comments, errors, and debug messages. Add CONTROLLER and PERIPHERAL constants to pyb.SPI and pyb.I2C classes; retain MASTER and SLAVE constants for backward compatiblity.
Replace "master" with "controller" and "slave" with "peripheral" in comments, errors, and debug messages. Add CONTROLLER and PERIPHERAL constants to pyb.SPI and pyb.I2C classes; retain MASTER and SLAVE constants for backward compatiblity.