Merge pull request #459 from tomwilkie/master

Typo in sites page for building weave

site/building.md

@@ -51,7 +51,7 @@ $ make
 This will build the weave components and package them into three
 Docker images (`zettio/weave`, `zettio/weavedns`, and
 `zettio/weavetools`).  These are then exported (as
-`weave.tar`, `weavends.tar` and `weavetools.tar`).
+`weave.tar`, `weavedns.tar` and `weavetools.tar`).
 
 ## Building in a Docker container