tasks.py: Copy DESCRIPTION.en_us.html if found in root of repo
tasks.py: Copy DESCRIPTION.en_us.html if found in root of repo

davelab6/fontbakery,vitalyvolkov/fontbakery,googlefonts/fontbakery,googlefonts/fontbakery,graphicore/fontbakery,vitalyvolkov/fontbakery,jessamynsmith/fontbakery,moyogo/fontbakery,graphicore/fontbakery,vitalyvolkov/fontbakery,moyogo/fontbakery,moyogo/fontbakery,googlefonts/fontbakery,graphicore/fontbakery