bump version number to 0.7.8
bump version number to 0.7.8

lefay1982/spitfire,infin8/spitfire,YifanCao/spitfire,funic/spitfire,tkisme/spitfire,ahmedissa/spitfire,tkisme/spitfire,ahmedissa/spitfire,infin8/spitfire,lefay1982/spitfire,YifanCao/spitfire,coverband/spitfire,tkisme/spitfire,lefay1982/spitfire,YifanCao/spitfire,funic/spitfire,ahmedissa/spitfire,TheProjecter/spitfire,ahmedissa/spitfire,coverband/spitfire,infin8/spitfire,lefay1982/spitfire,funic/spitfire,coverband/spitfire,funic/spitfire,TheProjecter/spitfire,YifanCao/spitfire,TheProjecter/spitfire,TheProjecter/spitfire,coverband/spitfire,tkisme/spitfire,infin8/spitfire