Fixed bug in update_object() where error would be returned if data was None.  The content-length wasn't getting set in this case.  Now setting content-length to zero when data is None and only metadata is getting updated.
Fixed bug in update_object() where error would be returned if data was None.  The content-length wasn't getting set in this case.  Now setting content-length to zero when data is None and only metadata is getting updated.
chadlung/atmos-python,MrBasset/atmos-python,ab24v07/atmos-python,lweeks/atmos-python