New file release: alpha-release-1-6

The latest file release is available in the Files section of the project. Read the project's status at http://netbsd-ppbus.sourceforge.net/project_status.html for more details.

Notable features: 'atppc' device does not block interrupts as much as it used to (maybe less interferance with other activities), 'lpbb' device added for I2C bus support, 'ppi' and 'lp' devices renamed, and 'lptctl' utility has new capabilities and argument processing(the 'lpt' device has new/different ioctl commands).