Git initialisation

[annejan]

When creating a new folder git is not initialized . . that causes issues.
Related to: #66 and #55

Also found here http://barrenfrozenwasteland.com/2015/06/migrating-lastpass-to-pass-password-store/

[annejan]

Some work done on this by @dennisdegreef and me.
704b9f1
ddf991b