Update README for QLoggingCategory usage
Update README for QLoggingCategory usage

hejunbok/qgroundcontrol,jy723/qgroundcontrol,devbharat/qgroundcontrol,mihadyuk/qgroundcontrol,greenoaktree/qgroundcontrol,greenoaktree/qgroundcontrol,cfelipesouza/qgroundcontrol,iidioter/qgroundcontrol,UAVenture/qgroundcontrol,mihadyuk/qgroundcontrol,RedoXyde/PX4_qGCS,mihadyuk/qgroundcontrol,fizzaly/qgroundcontrol,devbharat/qgroundcontrol,fizzaly/qgroundcontrol,RedoXyde/PX4_qGCS,UAVenture/qgroundcontrol,Hunter522/qgroundcontrol,scott-eddy/qgroundcontrol,caoxiongkun/qgroundcontrol,cfelipesouza/qgroundcontrol,caoxiongkun/qgroundcontrol,scott-eddy/qgroundcontrol,fizzaly/qgroundcontrol,iidioter/qgroundcontrol,RedoXyde/PX4_qGCS,BMP-TECH/qgroundcontrol,TheIronBorn/qgroundcontrol,dagoodma/qgroundcontrol,greenoaktree/qgroundcontrol,catch-twenty-two/qgroundcontrol,dagoodma/qgroundcontrol,UAVenture/qgroundcontrol,LIKAIMO/qgroundcontrol,ethz-asl/qgc_asl,TheIronBorn/qgroundcontrol,nado1688/qgroundcontrol,BMP-TECH/qgroundcontrol,scott-eddy/qgroundcontrol,jy723/qgroundcontrol,nado1688/qgroundcontrol,devbharat/qgroundcontrol,hejunbok/qgroundcontrol,jy723/qgroundcontrol,BMP-TECH/qgroundcontrol,greenoaktree/qgroundcontrol,hejunbok/qgroundcontrol,LIKAIMO/qgroundcontrol,devbharat/qgroundcontrol,mihadyuk/qgroundcontrol,LIKAIMO/qgroundcontrol,cfelipesouza/qgroundcontrol,kd0aij/qgroundcontrol,jy723/qgroundcontrol,TheIronBorn/qgroundcontrol,mihadyuk/qgroundcontrol,CornerOfSkyline/qgroundcontrol,UAVenture/qgroundcontrol,lis-epfl/qgroundcontrol,caoxiongkun/qgroundcontrol,caoxiongkun/qgroundcontrol,CornerOfSkyline/qgroundcontrol,fizzaly/qgroundcontrol,RedoXyde/PX4_qGCS,catch-twenty-two/qgroundcontrol,iidioter/qgroundcontrol,dagoodma/qgroundcontrol,catch-twenty-two/qgroundcontrol,kd0aij/qgroundcontrol,catch-twenty-two/qgroundcontrol,CornerOfSkyline/qgroundcontrol,kd0aij/qgroundcontrol,mihadyuk/qgroundcontrol,kd0aij/qgroundcontrol,UAVenture/qgroundcontrol,remspoor/qgroundcontrol,remspoor/qgroundcontrol,scott-eddy/qgroundcontrol,lis-epfl/qgroundcontrol,UAVenture/qgroundcontrol,Hunter522/qgroundcontrol,lis-epfl/qgroundcontrol,TheIronBorn/qgroundcontrol,remspoor/qgroundcontrol,LIKAIMO/qgroundcontrol,iidioter/qgroundcontrol,CornerOfSkyline/qgroundcontrol,remspoor/qgroundcontrol,TheIronBorn/qgroundcontrol,jy723/qgroundcontrol,ethz-asl/qgc_asl,kd0aij/qgroundcontrol,CornerOfSkyline/qgroundcontrol,hejunbok/qgroundcontrol,caoxiongkun/qgroundcontrol,hejunbok/qgroundcontrol,remspoor/qgroundcontrol,RedoXyde/PX4_qGCS,cfelipesouza/qgroundcontrol,ethz-asl/qgc_asl,cfelipesouza/qgroundcontrol,BMP-TECH/qgroundcontrol,catch-twenty-two/qgroundcontrol,LIKAIMO/qgroundcontrol,devbharat/qgroundcontrol,dagoodma/qgroundcontrol,iidioter/qgroundcontrol,scott-eddy/qgroundcontrol,nado1688/qgroundcontrol,lis-epfl/qgroundcontrol,nado1688/qgroundcontrol,remspoor/qgroundcontrol,greenoaktree/qgroundcontrol,fizzaly/qgroundcontrol,nado1688/qgroundcontrol,catch-twenty-two/qgroundcontrol,nado1688/qgroundcontrol,devbharat/qgroundcontrol,Hunter522/qgroundcontrol,iidioter/qgroundcontrol,Hunter522/qgroundcontrol,caoxiongkun/qgroundcontrol,greenoaktree/qgroundcontrol,RedoXyde/PX4_qGCS,dagoodma/qgroundcontrol,jy723/qgroundcontrol,fizzaly/qgroundcontrol,ethz-asl/qgc_asl,ethz-asl/qgc_asl,dagoodma/qgroundcontrol,scott-eddy/qgroundcontrol,kd0aij/qgroundcontrol,LIKAIMO/qgroundcontrol,cfelipesouza/qgroundcontrol,Hunter522/qgroundcontrol,BMP-TECH/qgroundcontrol,BMP-TECH/qgroundcontrol,CornerOfSkyline/qgroundcontrol,TheIronBorn/qgroundcontrol,hejunbok/qgroundcontrol,Hunter522/qgroundcontrol,lis-epfl/qgroundcontrol