fix node:0 alias tag and add node:4 alias tag. Fixes #43

node:4 should be an alias for node:4.0.0
node:0 should be an alias for nod:0.12.7

generate-stackbrew-library.sh

@@ -3,7 +3,8 @@ set -e
 
 hash git 2>/dev/null || { echo >&2 "git not found, exiting."; }
 
-array_4_0='0 latest';
+array_0_12='0';
+array_4_0='4 latest';
 
 cd $(cd ${0%/*} && pwd -P);