Fix cache on windows
Fix cache on windows

If the file already exists, on windows, the rename causes an OSError
File Already Exists on the os.rename call

This sanely handles that issue

florianjacob/webassets,JDeuce/webassets,wijerasa/webassets,glorpen/webassets,aconrad/webassets,heynemann/webassets,john2x/webassets,JDeuce/webassets,aconrad/webassets,aconrad/webassets,glorpen/webassets,florianjacob/webassets,john2x/webassets,wijerasa/webassets,heynemann/webassets,heynemann/webassets,scorphus/webassets,scorphus/webassets,glorpen/webassets