Freeze modification time when gzipping files to S3 (#120)
Freeze modification time when gzipping files to S3 (#120)

to allow detection of changes in gzipped files by MD5 SUM in the same
way as for non gzipped files
faxioman/django-storages,jschneier/django-storages,syapse/django-storages,chenjyw/django-storages,hobarrera/django-storages,mroth23/django-storages,juiceinc/django-storages,mbarrien/django-storages,chenjyw/django-storages