Search results now retain relative order. Faster display of search titles.

Also, MWNetwork op can now be interrogated (via dataRetrievedExpectedLength and dataRetrieved.length) for tracking the progress of downloads. Previously only upload progress was obtainable.

Added SearchResultsCell object to make search results look more like mockup.

Change-Id: Ib8aa891027bb100543973591df2c17683dbaf96f