doc: create additional group for utils
doc: create additional group for utils

A-Paul/RIOT,mfrey/RIOT,Hyungsin/RIOT-OS,neiljay/RIOT,basilfx/RIOT,OlegHahm/RIOT,LudwigKnuepfer/RIOT,LudwigKnuepfer/RIOT,gebart/RIOT,jfischer-phytec-iot/RIOT,plushvoxel/RIOT,cladmi/RIOT,LudwigOrtmann/RIOT,jasonatran/RIOT,RIOT-OS/RIOT,neiljay/RIOT,ant9000/RIOT,rfuentess/RIOT,kerneltask/RIOT,OTAkeys/RIOT,x3ro/RIOT,kbumsik/RIOT,thomaseichinger/RIOT,miri64/RIOT,adjih/RIOT,katezilla/RIOT,dailab/RIOT,LudwigOrtmann/RIOT,adjih/RIOT,OlegHahm/RIOT,biboc/RIOT,RIOT-OS/RIOT,dailab/RIOT,katezilla/RIOT,kbumsik/RIOT,gebart/RIOT,OTAkeys/RIOT,jasonatran/RIOT,jasonatran/RIOT,dkm/RIOT,smlng/RIOT,gebart/RIOT,OTAkeys/RIOT,jfischer-phytec-iot/RIOT,Hyungsin/RIOT-OS,hamilton-mote/RIOT-OS,thomaseichinger/RIOT,toonst/RIOT,basilfx/RIOT,yogo1212/RIOT,LudwigOrtmann/RIOT,katezilla/RIOT,A-Paul/RIOT,lazytech-org/RIOT,immesys/RiSyn,roberthartung/RIOT,TobiasFredersdorf/RIOT,dailab/RIOT,mtausig/RIOT,beurdouche/RIOT,Ell-i/RIOT,Ell-i/RIOT,avmelnikoff/RIOT,avmelnikoff/RIOT,toonst/RIOT,Hyungsin/RIOT-OS,Josar/RIOT,neumodisch/RIOT,BytesGalore/RIOT,roberthartung/RIOT,RIOT-OS/RIOT,A-Paul/RIOT,cladmi/RIOT,avmelnikoff/RIOT,backenklee/RIOT,cladmi/RIOT,authmillenon/RIOT,hamilton-mote/RIOT-OS,jfischer-phytec-iot/RIOT,neumodisch/RIOT,aeneby/RIOT,Hyungsin/RIOT-OS,RIOT-OS/RIOT,josephnoir/RIOT,gautric/RIOT,kerneltask/RIOT,adrianghc/RIOT,hamilton-mote/RIOT-OS,kaleb-himes/RIOT,ant9000/RIOT,neumodisch/RIOT,TobiasFredersdorf/RIOT,x3ro/RIOT,beurdouche/RIOT,rfuentess/RIOT,OlegHahm/RIOT,gautric/RIOT,TobiasFredersdorf/RIOT,BytesGalore/RIOT,jbeyerstedt/RIOT-OTA-update,dailab/RIOT,backenklee/RIOT,mtausig/RIOT,neiljay/RIOT,roberthartung/RIOT,kYc0o/RIOT,kbumsik/RIOT,adrianghc/RIOT,backenklee/RIOT,kaleb-himes/RIOT,kerneltask/RIOT,mtausig/RIOT,katezilla/RIOT,miri64/RIOT,beurdouche/RIOT,Josar/RIOT,kYc0o/RIOT,jbeyerstedt/RIOT-OTA-update,Hyungsin/RIOT-OS,kbumsik/RIOT,OTAkeys/RIOT,dkm/RIOT,smlng/RIOT,yogo1212/RIOT,yogo1212/RIOT,LudwigOrtmann/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,jasonatran/RIOT,cladmi/RIOT,gebart/RIOT,yogo1212/RIOT,kaleb-himes/RIOT,neiljay/RIOT,OlegHahm/RIOT,cladmi/RIOT,plushvoxel/RIOT,josephnoir/RIOT,authmillenon/RIOT,kerneltask/RIOT,kaspar030/RIOT,neumodisch/RIOT,adrianghc/RIOT,roberthartung/RIOT,neumodisch/RIOT,beurdouche/RIOT,immesys/RiSyn,josephnoir/RIOT,kaspar030/RIOT,aeneby/RIOT,authmillenon/RIOT,gautric/RIOT,thomaseichinger/RIOT,mfrey/RIOT,LudwigOrtmann/RIOT,adrianghc/RIOT,ks156/RIOT,kaspar030/RIOT,avmelnikoff/RIOT,immesys/RiSyn,BytesGalore/RIOT,lazytech-org/RIOT,syin2/RIOT,dailab/RIOT,rfuentess/RIOT,toonst/RIOT,neiljay/RIOT,smlng/RIOT,plushvoxel/RIOT,syin2/RIOT,jbeyerstedt/RIOT-OTA-update,toonst/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,RIOT-OS/RIOT,ks156/RIOT,ks156/RIOT,kaspar030/RIOT,basilfx/RIOT,dkm/RIOT,kaspar030/RIOT,kYc0o/RIOT,authmillenon/RIOT,jasonatran/RIOT,kbumsik/RIOT,hamilton-mote/RIOT-OS,katezilla/RIOT,plushvoxel/RIOT,OlegHahm/RIOT,adrianghc/RIOT,lazytech-org/RIOT,ks156/RIOT,A-Paul/RIOT,dkm/RIOT,mfrey/RIOT,aeneby/RIOT,roberthartung/RIOT,jbeyerstedt/RIOT-OTA-update,aeneby/RIOT,mtausig/RIOT,aeneby/RIOT,adjih/RIOT,Josar/RIOT,basilfx/RIOT,A-Paul/RIOT,Josar/RIOT,Ell-i/RIOT,basilfx/RIOT,gebart/RIOT,adjih/RIOT,gautric/RIOT,kerneltask/RIOT,miri64/RIOT,ant9000/RIOT,rfuentess/RIOT,toonst/RIOT,thomaseichinger/RIOT,gautric/RIOT,LudwigKnuepfer/RIOT,x3ro/RIOT,biboc/RIOT,x3ro/RIOT,syin2/RIOT,lazytech-org/RIOT,immesys/RiSyn,smlng/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,backenklee/RIOT,backenklee/RIOT,LudwigKnuepfer/RIOT,thomaseichinger/RIOT,lazytech-org/RIOT,biboc/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,TobiasFredersdorf/RIOT,mfrey/RIOT,jfischer-phytec-iot/RIOT,kYc0o/RIOT,jfischer-phytec-iot/RIOT,dkm/RIOT,kYc0o/RIOT,biboc/RIOT,biboc/RIOT,Ell-i/RIOT,kaleb-himes/RIOT,ant9000/RIOT,beurdouche/RIOT,miri64/RIOT,plushvoxel/RIOT,TobiasFredersdorf/RIOT,mtausig/RIOT,smlng/RIOT,josephnoir/RIOT,yogo1212/RIOT,OTAkeys/RIOT,LudwigKnuepfer/RIOT,mfrey/RIOT,syin2/RIOT,neumodisch/RIOT,Josar/RIOT,adjih/RIOT,BytesGalore/RIOT,ant9000/RIOT,miri64/RIOT,rfuentess/RIOT,ks156/RIOT,immesys/RiSyn,foss-for-synopsys-dwc-arc-processors/RIOT,kaleb-himes/RIOT,LudwigOrtmann/RIOT,authmillenon/RIOT,josephnoir/RIOT,BytesGalore/RIOT,syin2/RIOT,authmillenon/RIOT,Ell-i/RIOT,immesys/RiSyn,avmelnikoff/RIOT,jbeyerstedt/RIOT-OTA-update,hamilton-mote/RIOT-OS,x3ro/RIOT,yogo1212/RIOT