Commentary

Additional description
Create Inheritance.md

Complex numbers as an inherited class.
Added inheritance and friends

Expanding the Spiral learning section
Modified file using Dillinger
Modified file using Dillinger
Modified file using Dillinger
Create Variables and Types.md

Template file for tutorial on types and variables, borrowed from C tutorial.
Modified file using Dillinger
Modified file using Dillinger
Modified file using Dillinger
Modified file using Dillinger
Update Hello, World!.md

replaced `printf` with `cout`
Merge pull request #100 from kgashok/master

Added Inheritance