Add goproperties

Signed-off-by: Kare Nuorteva <kare.nuorteva@me.com>
Replace Current() with StringToEnvironment()

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

Signed-off-by: Kare Nuorteva <kare.nuorteva@me.com>
Hide goproperties within environment

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

    While at it, refactor tests.

Signed-off-by: Kare Nuorteva <kare.nuorteva@me.com>
Add test for non existing key

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