cli: Read a file's SHA1 from the cache instead of recalculating it
cli: Read a file's SHA1 from the cache instead of recalculating it

Closes #448.

michaelrup/scancode-toolkit,michaelrup/scancode-toolkit,yashdsaraf/scancode-toolkit,yashdsaraf/scancode-toolkit,yashdsaraf/scancode-toolkit,marcreyesph/scancode-toolkit,michaelrup/scancode-toolkit,yasharmaster/scancode-toolkit,yashdsaraf/scancode-toolkit,yasharmaster/scancode-toolkit,michaelrup/scancode-toolkit,yashdsaraf/scancode-toolkit,yasharmaster/scancode-toolkit,yashdsaraf/scancode-toolkit,yasharmaster/scancode-toolkit,marcreyesph/scancode-toolkit,yasharmaster/scancode-toolkit,marcreyesph/scancode-toolkit,yashdsaraf/scancode-toolkit,marcreyesph/scancode-toolkit,michaelrup/scancode-toolkit,yasharmaster/scancode-toolkit,michaelrup/scancode-toolkit,yasharmaster/scancode-toolkit,yasharmaster/scancode-toolkit,yashdsaraf/scancode-toolkit,michaelrup/scancode-toolkit,marcreyesph/scancode-toolkit,marcreyesph/scancode-toolkit,michaelrup/scancode-toolkit,michaelrup/scancode-toolkit,yasharmaster/scancode-toolkit,yashdsaraf/scancode-toolkit,marcreyesph/scancode-toolkit,marcreyesph/scancode-toolkit,michaelrup/scancode-toolkit,michaelrup/scancode-toolkit,yasharmaster/scancode-toolkit,marcreyesph/scancode-toolkit,marcreyesph/scancode-toolkit,yashdsaraf/scancode-toolkit,marcreyesph/scancode-toolkit,yasharmaster/scancode-toolkit,yashdsaraf/scancode-toolkit,yashdsaraf/scancode-toolkit,michaelrup/scancode-toolkit,marcreyesph/scancode-toolkit,yasharmaster/scancode-toolkit