[Stage 4] Module 3 of Data Structures Boot-Camp

[kavuong]

Technical edits needed on all of the Markdown files in Module 3

• [x] Activity 1: Graphs
• [x] Activity 2: Searching Algorithms
• [x] Lab 1: nColorable
• [x] Lab 2: BFS Maze
• [x] Lab 3: Sudoku Solver
• [x] Lab 4: File System

Deadline Sat, 4/4