Merge pull request #359 from weaveworks/use_sh_instead_of_bash

Use /bin/sh instead of /bin/bash so it can be used in boot2docker

scope

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 set -eu
 
@@ -77,7 +77,7 @@ check_not_running() {
 # Run `weave expose` if it's not already exposed.
 weave_expose() {
     status=$(weave ps weave:expose | awk '{print $3}' 2>/dev/null)
-    if [ "$status" == "" ]; then
+    if [ "$status" = "" ]; then
         weave expose
     fi
 }