Merge pull request #87 from flygare/dependency_check

Fix dirname crash

before_install.sh

@@ -4,7 +4,7 @@ test -f "$(which docker )" || { echo "Docker not installed"; exit 1; }
 test -f "$(which npm)" || { echo "NPM not installed"; exit 1; }
 test -f "$(which node)" || { echo "Node not installed";
     node_path=$(which nodejs)
-    test -f "$(which nodejs)" && echo "Please symlink $(which nodejs) to $(dirname $k)/node";
+    test -f "$node_path" && echo "Please symlink $node_path to $(dirname $node_path)/node";
     exit 1; }
 test -f "$(which md5sum )" || { echo "md5sum not installed"; exit 1; }
 test -f "$(which wget )" || { echo "wget not installed"; exit 1; }