document new codes m50..m53;  remove documentation of m48/m49 since m50/m51 do the same job better
document new codes m50..m53;  remove documentation of m48/m49 since m50/m51 do the same job better

kinsamanka/machinekit,cdsteinkuehler/MachineKit,cdsteinkuehler/linuxcnc,EqAfrica/machinekit,unseenlaser/machinekit,ArcEye/machinekit-testing,jaguarcat79/ILC-with-LinuxCNC,EqAfrica/machinekit,cnc-club/linuxcnc,araisrobo/linuxcnc,cnc-club/linuxcnc,mhaberler/machinekit,ianmcmahon/linuxcnc-mirror,aschiffler/linuxcnc,ArcEye/machinekit-testing,unseenlaser/linuxcnc,mhaberler/machinekit,EqAfrica/machinekit,ikcalB/linuxcnc-mirror,cdsteinkuehler/linuxcnc,Cid427/machinekit,ianmcmahon/linuxcnc-mirror,Cid427/machinekit,ArcEye/machinekit-testing,yishinli/emc2,cdsteinkuehler/linuxcnc,unseenlaser/machinekit,unseenlaser/machinekit,cnc-club/linuxcnc,strahlex/machinekit,strahlex/machinekit,cdsteinkuehler/linuxcnc,EqAfrica/machinekit,yishinli/emc2,araisrobo/linuxcnc,RunningLight/machinekit,mhaberler/machinekit,EqAfrica/machinekit,jaguarcat79/ILC-with-LinuxCNC,jaguarcat79/ILC-with-LinuxCNC,ArcEye/machinekit-testing,bobvanderlinden/machinekit,RunningLight/machinekit,ArcEye/MK-Qt5,cdsteinkuehler/linuxcnc,araisrobo/machinekit,ArcEye/MK-Qt5,narogon/linuxcnc,araisrobo/machinekit,RunningLight/machinekit,Cid427/machinekit,EqAfrica/machinekit,cdsteinkuehler/MachineKit,mhaberler/machinekit,ianmcmahon/linuxcnc-mirror,RunningLight/machinekit,jaguarcat79/ILC-with-LinuxCNC,araisrobo/machinekit,mhaberler/machinekit,ArcEye/MK-Qt5,ianmcmahon/linuxcnc-mirror,cdsteinkuehler/MachineKit,cdsteinkuehler/MachineKit,bobvanderlinden/machinekit,RunningLight/machinekit,unseenlaser/linuxcnc,araisrobo/machinekit,unseenlaser/linuxcnc,ArcEye/MK-Qt5,strahlex/machinekit,ArcEye/machinekit-testing,unseenlaser/machinekit,ArcEye/machinekit-testing,aschiffler/linuxcnc,bmwiedemann/linuxcnc-mirror,Cid427/machinekit,unseenlaser/linuxcnc,Cid427/machinekit,Cid427/machinekit,cnc-club/linuxcnc,cdsteinkuehler/MachineKit,araisrobo/machinekit,bobvanderlinden/machinekit,RunningLight/machinekit,yishinli/emc2,araisrobo/machinekit,aschiffler/linuxcnc,bmwiedemann/linuxcnc-mirror,bobvanderlinden/machinekit,unseenlaser/machinekit,jaguarcat79/ILC-with-LinuxCNC,ianmcmahon/linuxcnc-mirror,ianmcmahon/linuxcnc-mirror,bmwiedemann/linuxcnc-mirror,aschiffler/linuxcnc,mhaberler/machinekit,bmwiedemann/linuxcnc-mirror,kinsamanka/machinekit,narogon/linuxcnc,strahlex/machinekit,kinsamanka/machinekit,narogon/linuxcnc,bobvanderlinden/machinekit,bmwiedemann/linuxcnc-mirror,kinsamanka/machinekit,Cid427/machinekit,bobvanderlinden/machinekit,araisrobo/linuxcnc,araisrobo/linuxcnc,ikcalB/linuxcnc-mirror,Cid427/machinekit,strahlex/machinekit,EqAfrica/machinekit,ikcalB/linuxcnc-mirror,bmwiedemann/linuxcnc-mirror,ArcEye/MK-Qt5,aschiffler/linuxcnc,narogon/linuxcnc,ArcEye/machinekit-testing,narogon/linuxcnc,bobvanderlinden/machinekit,bobvanderlinden/machinekit,ikcalB/linuxcnc-mirror,cnc-club/linuxcnc,kinsamanka/machinekit,unseenlaser/machinekit,ArcEye/MK-Qt5,mhaberler/machinekit,araisrobo/machinekit,cdsteinkuehler/linuxcnc,RunningLight/machinekit,cnc-club/linuxcnc,kinsamanka/machinekit,ArcEye/MK-Qt5,mhaberler/machinekit,unseenlaser/machinekit,ArcEye/machinekit-testing,EqAfrica/machinekit,ikcalB/linuxcnc-mirror,ArcEye/MK-Qt5,ikcalB/linuxcnc-mirror,araisrobo/machinekit,RunningLight/machinekit,unseenlaser/linuxcnc,ikcalB/linuxcnc-mirror,ianmcmahon/linuxcnc-mirror,unseenlaser/machinekit,kinsamanka/machinekit,araisrobo/machinekit,kinsamanka/machinekit,cnc-club/linuxcnc,yishinli/emc2,araisrobo/linuxcnc,strahlex/machinekit,bmwiedemann/linuxcnc-mirror,cdsteinkuehler/MachineKit,strahlex/machinekit