Pooled Connections update

Was working with the client/with-connection-pool and found that this was building and tearing down the connection manager every time it was called.  Also noticed that ThreadSafeClientConnManager had been deprecated in apache.  I was able to work around the reusable pooling issue in my own project, but once I saw the deprecation on the manager I thought it might be wise to make my changes here for future use.  I added client/with-named-connection-pool, conn-mgr/make-manager, and conn-mgr/shutdown-manager as well as swapping out ThreadSafeClientConnManager for org.apache.http.impl.conn.PoolingClientConnectionManager.  

Hope this helps,
DJJ