Surrounds the Inputfile Path with "
For %f (Filename) using NodeJS path.basename function instead of raw inputfile because inputfile can be a filepath.
For %b (Filename without Extension) using NodeJS path.basename function in combination with path.extname as second argument.
Merge pull request #127 from stf1981/master

Fix for issue #126 and a fix for the %f placeholder from the takeScreenshots filename option.