Spellchecker : A C++ introduction project

Key concepts to be covered:

1. How use STL data structures, compile sourcefiles into executables, write tests
2. How to write classes, implement data structures with pointers
3. Practice advanced pointer mechanics, maybe templatization in C++.

For detail, see: https://docs.google.com/document/d/1KpSqnDshk-xzgbqK8JDZ1Dulx2mXhQhx550WzY9_7IE/edit?usp=sharing