N-Root Replication

<ul>
<li>PeerMaker can enable 0 as well as n root replication</li>
<li>Added and tested new storage memory replication, which maps n times locations to n times peer ids</li>
<li>Implemented n root replication approach</li>
<li>Tested n root approach for replica factors 1, 2 and 3, but only local behaviour</li>
<li>Tested 0 root approach for replica factors 1 and 2, detected inconsistencies, left for discussion</li>
</ul>