Update strings.xml
Update strings.xml

Fixed some mistakes and bugs from Original translation + some small changes.

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