Issue 378: Use http/1.0 for retrieving blobs from ddfs.

There seems to be a bug in the erlang httpc client.  In certain cases, more than
one http request may be put on a single tcp connection.  When the server
responds to the http request, it closes the tcp connection and the http request
will be lost.
Merge pull request #379 from pooya/shayan/issue378

Issue 378: Use http/1.0 for retrieving blobs from ddfs.