Merge pull request #5 from mrwacky42/master

Template out etcd version everywhere.

Author: bakins

scripts/install-etcd

@@ -9,7 +9,7 @@ fi
 cd /tmp
 
 if [ ! -f etcd-${ETCD_BINARY_VERSION}.tar.gz ]; then
-  curl -o etcd-${ETCD_BINARY_VERSION}.tar.gz -L -s https://github.com/coreos/etcd/releases/download/v2.0.11/etcd-v2.0.11-linux-amd64.tar.gz
+  curl -o etcd-${ETCD_BINARY_VERSION}.tar.gz -L -s https://github.com/coreos/etcd/releases/download/v${ETCD_BINARY_VERSION}/etcd-v${ETCD_BINARY_VERSION}-linux-amd64.tar.gz
 fi
 
 mkdir -p /opt/etcd-${ETCD_BINARY_VERSION}/bin