Add initial support for reading the B2G keyboard. (dm)


git-svn-id: svn://mielke.cc/main/brltty@7072 91a5dbb7-01b9-0310-9b5f-b28072856b6e
Add an initial key table for the B2G. (dm)


git-svn-id: svn://mielke.cc/main/brltty@7073 91a5dbb7-01b9-0310-9b5f-b28072856b6e