release-notes.txt: add notes for 2019.10 release
release-notes.txt: add notes for 2019.10 release

josephnoir/RIOT,ant9000/RIOT,toonst/RIOT,kaspar030/RIOT,authmillenon/RIOT,toonst/RIOT,basilfx/RIOT,OTAkeys/RIOT,RIOT-OS/RIOT,x3ro/RIOT,RIOT-OS/RIOT,ant9000/RIOT,basilfx/RIOT,yogo1212/RIOT,authmillenon/RIOT,mtausig/RIOT,OTAkeys/RIOT,x3ro/RIOT,x3ro/RIOT,basilfx/RIOT,smlng/RIOT,basilfx/RIOT,authmillenon/RIOT,OTAkeys/RIOT,kaspar030/RIOT,kYc0o/RIOT,ant9000/RIOT,kaspar030/RIOT,OlegHahm/RIOT,x3ro/RIOT,toonst/RIOT,aeneby/RIOT,kYc0o/RIOT,aeneby/RIOT,kYc0o/RIOT,mtausig/RIOT,miri64/RIOT,toonst/RIOT,RIOT-OS/RIOT,OTAkeys/RIOT,yogo1212/RIOT,jasonatran/RIOT,mtausig/RIOT,yogo1212/RIOT,smlng/RIOT,yogo1212/RIOT,x3ro/RIOT,aeneby/RIOT,miri64/RIOT,OTAkeys/RIOT,smlng/RIOT,toonst/RIOT,josephnoir/RIOT,ant9000/RIOT,OlegHahm/RIOT,jasonatran/RIOT,kYc0o/RIOT,miri64/RIOT,OlegHahm/RIOT,ant9000/RIOT,mtausig/RIOT,smlng/RIOT,yogo1212/RIOT,authmillenon/RIOT,mtausig/RIOT,kYc0o/RIOT,authmillenon/RIOT,kaspar030/RIOT,authmillenon/RIOT,OlegHahm/RIOT,josephnoir/RIOT,smlng/RIOT,OlegHahm/RIOT,jasonatran/RIOT,RIOT-OS/RIOT,aeneby/RIOT,jasonatran/RIOT,basilfx/RIOT,josephnoir/RIOT,yogo1212/RIOT,kaspar030/RIOT,josephnoir/RIOT,aeneby/RIOT,jasonatran/RIOT,RIOT-OS/RIOT,miri64/RIOT,miri64/RIOT