Update index.html

redirect to course outline wiki
Update index.html
adding lectures and labs for sessions 3 & 4
adding lec 3 & 4
added Week 1 content
adding Lab 1 notebook as HTML
adding html of lab 2
Adding Lab and Lecture 5 on probability and statistics
revised lab
fixed problem 3
adding How to Lie With Statistics book cover
Adding Session 6 materials
Finalized Multiple Linear Regression Lab
added HTML version of lab 6
Lec08
fix paths for lab8
odds ratio text
added HTML version of lab 8 notebook
clear output
final lab8