Update submodules to point to public repos

.gitmodules

 [submodule "externals/evetool"]
 	path = externals/evetool
-	url = ssh://renji.org.uk/home/chris/git/evetool/
+	url = git://github.com/csmith/EveTool.git
 [submodule "externals/util"]
 	path = externals/util
-	url = ssh://renji/home/chris/git/util
+	url = git://github.com/csmith/Util.git
 [submodule "externals/dmdirc-plugins"]
 	path = externals/dmdirc-plugins
 	url = git://dmdirc.com/plugins