Adds references

README.md

@@ -18,10 +18,13 @@
 
 # Design
 
-Similar to this: http://threejs.org/examples/#webgl_lines_colors
+Similar to [this three.js design](http://threejs.org/examples/#webgl_lines_colors)
 
 - Black backgrund
 - Wireframe of room per floor tagged with name of room
 - Highlight room by drawing color semi-transparent glowing cube on tob of room floor 
     - Controlled by query param and browser controls
 
+# References
+- [Three.js](http://threejs.org/docs/)
+- [PDF maps of Chateau Neuf](http://www.admin.uio.no/ta/PDF_fra_Pythagoras_bygningsvis_public/universitetet/blindern/bl38/bl38.htm)