Rename the sys_<platform> files to system_<platform>. (dm)


git-svn-id: svn://mielke.cc/main/brltty@7493 91a5dbb7-01b9-0310-9b5f-b28072856b6e
Add more macros to make the writing of braille key tables a bit easier. (dm)


git-svn-id: svn://mielke.cc/main/brltty@7494 91a5dbb7-01b9-0310-9b5f-b28072856b6e
Add the beginnings of a driver for the Braille Memo. (dm)


git-svn-id: svn://mielke.cc/main/brltty@7495 91a5dbb7-01b9-0310-9b5f-b28072856b6e