Refactoring: use common method to retrieve JSON
Refactoring: use common method to retrieve JSON

lewurm/cgeo,schwabe/cgeo,vishwakulkarni/cgeo,SammysHP/cgeo,superspindel/cgeo,tobiasge/cgeo,mucek4/cgeo,madankb/cgeo,rsudev/c-geo-opensource,rsudev/c-geo-opensource,lewurm/cgeo,madankb/cgeo,samueltardieu/cgeo,brok85/cgeo,brok85/cgeo,matej116/cgeo,S-Bartfast/cgeo,xiaoyanit/cgeo,SammysHP/cgeo,ThibaultR/cgeo,schwabe/cgeo,madankb/cgeo,kumy/cgeo,rsudev/c-geo-opensource,superspindel/cgeo,tobiasge/cgeo,cgeo/cgeo,Bananeweizen/cgeo,xiaoyanit/cgeo,KublaikhanGeek/cgeo,lewurm/cgeo,S-Bartfast/cgeo,pstorch/cgeo,yummy222/cgeo,S-Bartfast/cgeo,marco-dev/c-geo-opensource,Bananeweizen/cgeo,superspindel/cgeo,xiaoyanit/cgeo,samueltardieu/cgeo,vishwakulkarni/cgeo,marco-dev/c-geo-opensource,auricgoldfinger/cgeo,Huertix/cgeo,KublaikhanGeek/cgeo,yummy222/cgeo,marco-dev/c-geo-opensource,kumy/cgeo,Huertix/cgeo,mucek4/cgeo,KublaikhanGeek/cgeo,Huertix/cgeo,cgeo/cgeo,schwabe/cgeo,brok85/cgeo,mucek4/cgeo,pstorch/cgeo,ThibaultR/cgeo,matej116/cgeo,matej116/cgeo,cgeo/cgeo,ThibaultR/cgeo,auricgoldfinger/cgeo,Bananeweizen/cgeo,pstorch/cgeo,SammysHP/cgeo,cgeo/cgeo,yummy222/cgeo,tobiasge/cgeo,samueltardieu/cgeo,kumy/cgeo,schwabe/cgeo,vishwakulkarni/cgeo,auricgoldfinger/cgeo