Merge branch 'release/4.7' into develop
new naturalfilesize Django filter, wrapping humanize counterpart.
oops. import the new filter to make it available…
That's “naturalsize”, not “naturalfilesize”.
rename import
try to avoid running {pre,post}_requirements tasks  times, but just at most  times.
nastypo
avoid systematic harmless exception display.
version bump
Merge branch 'release/4.7.1'