Extract shared function

bin/circle-deploy-release

@@ -2,13 +2,11 @@
 
 set -e
 
+source "$(dirname "$(readlink -f "$0")")/circle-functions"
+
 source "$STATE"
 
-go get github.com/weaveworks/wordepress
-cd /home/ubuntu/src/github.com/weaveworks/wordepress
-git checkout v1.0.0
-cd cmd/wordepress
-go get
+install_wordepress v1.0.0
 
 cd $SRCDIR
 bin/publish-site "$WP_LIVE_URL" "$WP_LIVE_USER" "$WP_LIVE_PASSWORD"