docs/2016-11-02-geometry.md

+<!-- START doctoc generated TOC please keep comment here to allow auto update -->
+<!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
+**Table of Contents**  *generated with [DocToc](https://github.com/thlorenz/doctoc)*
+
+- [Rooms](#rooms)
+- [Subrooms](#subrooms)
+- [Obstacles](#obstacles)
+- [Transitions](#transitions)
+- [Crossings](#crossings)
+
+<!-- END doctoc generated TOC please keep comment here to allow auto update -->
+
 The main structure of the geometry file is as follows 
 
 ![The main components defining a geometry]({{ site.baseurl }}/img/class-diagram.png)