Wrapper over github.com/mattn/go-colorable that provides helper functions and variables

Mimic functions from standard fmt package but make them colorable-aware. Include

• colorable.Print
• colorable.Printf
• colorable.Println

Provides colorable.Stderr and colorable.Stdout variables. They have the same capabilities as os.Stderr and os.Stdout, but colorable-aware

Provides functions to output colored text, change background color, or add some text effect such as bold or underline