Update README
Update README

Fix some typos, added reference to Composer

flodolo/transvision,SkySymbol/transvision,flodolo/transvision,TheoChevalier/transvision,SkySymbol/transvision,mozfr/transvision,SkySymbol/transvision,flodolo/transvision,mozfr/transvision,TheoChevalier/transvision,pascalchevrel/transvision,flodolo/transvision,pascalchevrel/transvision,mozfr/transvision,mozfr/transvision,pascalchevrel/transvision,pascalchevrel/transvision,TheoChevalier/transvision,TheoChevalier/transvision,SkySymbol/transvision