Revert "Avoiding the double-reading problem of Net::HTTP"

This reverts commit 69f63b3d9a6ebb9d50b6df499a2c4f2197bcdbdc.
Revert "Support for S3::Object#stream"

This reverts commit 4688da0f7dd8b489ee521cd3f1f78be13e28bbfb.
bumped version