Added script for triggering the build

.github/trigger-workflow.sh

@@ -0,0 +1,18 @@
+#!/bin/sh
+
+if [ "$#" != 1 ]; then
+    echo "Usage: $0 <core-version>" 1>&2
+    exit 1
+fi
+
+if [ ! -r "$(dirname $0)/token" ]; then
+    echo "Create an API token on github with the 'deployment' privilege and" 1>&2
+    echo "put it into '$(dirname $0)/token'." 1>&2
+    exit 1
+fi
+
+curl -H "Authorization: token $(head -c 40 "$(dirname $0)/token")" \
+     -H "Content-Type: application/json" \
+     --data '{"ref":"action-test","required_contexts":[],"payload":{"coreversion":"'"$1"'"}}' \
+     https://api.github.com/repos/pmconrad/bitshares-gitian/deployments
+

.gitignore

@@ -1,2 +1,3 @@
 /docker
 /var
+.github/token