Merge pull request #1048 from squaremo/issue1040_eliminate_ipam_mentions

Remove references to 'IPAM' in docs and UI

Closes #1040.

weave

@@ -34,7 +34,7 @@ usage() {
     echo "                        [-initpeercount <count>] <peer> ..."
     echo "weave launch-dns    [<addr>]"
     echo "weave launch-proxy  [-H <endpoint>] [--with-dns | --without-dns]"
-    echo "                        [--no-default-ipam]"
+    echo "                        [--no-default-ipalloc]"
     echo "weave connect       [--replace] [<peer> ...]"
     echo "weave forget        <peer> ..."
     echo "weave run           [--with-dns | --without-dns] [<addr> ...]"