Improve error handling

Signed-off-by: Kare Nuorteva <kare.nuorteva@me.com>
Add Makefile

Signed-off-by: Kare Nuorteva <kare.nuorteva@me.com>
Rename gocat.go -> main.go

Signed-off-by: Kare Nuorteva <kare.nuorteva@me.com>
Add make target 'clean'

Signed-off-by: Kare Nuorteva <kare.nuorteva@me.com>
Add unit tests for existing functionality

Signed-off-by: Kare Nuorteva <kare.nuorteva@me.com>
Add benchmark test

Signed-off-by: Kare Nuorteva <kare.nuorteva@me.com>
Extract cat()

Signed-off-by: Kare Nuorteva <kare.nuorteva@me.com>
Add scripts for release automation

Signed-off-by: Kare Nuorteva <kare.nuorteva@me.com>
Release v0.0.1

Signed-off-by: Kare Nuorteva <kare.nuorteva@me.com>