links on front page

README.md

 # Computer vision lecture 865.24
 
 This repository contains the jekyll source for the computer vision lecture.
+
+Served at:
+https://ma865-24-computer-vision-quentinbolsee-251329cf45ac35c4cc76da85.pages.cba.mit.edu/

index.md

@@ -5,3 +5,9 @@ nav_order: 1
 ---
 
 # Computer vision
+
+## [Camera sensors]({{ '/01_cameras.html' | relative_url }})
+
+## [Passive scanning]({{ '/02_passive.html' | relative_url }})
+
+## [Active scanning]({{ '/03_active.html' | relative_url }})