Assignment 3

Contains instructions for assignment 3 indexer
Assignment 2 sorted-list

Contains assignment details on assignment 2 sorted-list
Revert "Assignment 3"

This reverts commit 8f7e8a4f9574f68b8cda50836702d8dd0617f85e.
Assignment 3 indexer

Contains assignment 3 details for indexer
sorted-list.h

Header file provided by Professor but modified for our assignment usage.