added push all subtrees script w/ burnettk

bin/push_all_subtrees

@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+
+function error_handler() {
+  >&2 echo "Exited with BAD EXIT CODE '${2}' in ${0} script at line: ${1}."
+  exit "$2"
+}
+trap 'error_handler ${LINENO} $?' ERR
+set -o errtrace -o errexit -o nounset -o pipefail
+
+script_dir="$( cd -- "$(dirname "$0")" >/dev/null 2>&1 ; pwd -P )"
+subtrees=$("${script_dir}/get_subtree_prefixes")
+
+for subtree in $subtrees ; do
+  echo -e "\n$subtree"
+  "${script_dir}/push_subtree" "$subtree"
+done