Add git hooks

.git_hooks/install_hooks.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+ln -s ./../../.git_hooks/pre-commit .git/hooks/pre-commit

.git_hooks/pre-commit

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+doctoc --title "# Table of Contents" .