Added a track command to git-flow-hotfix along the lines of the git-flow-feature track command

Author: vedang

git-flow-hotfix

@@ -47,6 +47,7 @@ usage() {
 	echo "       git flow hotfix start [-F] <version> [<base>]"
 	echo "       git flow hotfix finish [-Fsumpk] <version>"
 	echo "       git flow hotfix publish <version>"
+	echo "       git flow hotfix track <version>"
 }
 
 cmd_default() {
@@ -216,6 +217,26 @@ cmd_publish() {
 	echo
 }
 
+cmd_track() {
+	parse_args "$@"
+	require_version_arg
+
+	# sanity checks
+	require_clean_working_tree
+	require_branch_absent "$BRANCH"
+	git fetch -q "$ORIGIN"
+	require_branch "$ORIGIN/$BRANCH"
+
+	# create tracking branch
+	git checkout -b "$BRANCH" "$ORIGIN/$BRANCH"
+
+	echo
+	echo "Summary of actions:"
+	echo "- A new remote tracking branch '$BRANCH' was created"
+	echo "- You are now on branch '$BRANCH'"
+	echo
+}
+
 cmd_finish() {
 	DEFINE_boolean fetch false "fetch from $ORIGIN before performing finish" F
 	DEFINE_boolean sign false "sign the release tag cryptographically" s