R.T. Russell’s Z80 BBC Basic is now open source

More news from the CP/Mish front: As part of the work I've been doing with cpmish I've been trying to track down the copyright holders of some of the more classic pieces of CP/M software and asking them to license it in a way that allows redistribution. One of the people I contacted was R.T. Russell, the author of the classic Z80 BBC BASIC, and he very kindly sent me the source and agreed to allow it to be distributed under the terms of the zlib license. So it's now open source! I've made the 37-year-old source build and added it to the cpmish respository; it works fine and is shipping with the cpmish disk images.