playlist only works when directory matches cwd

[Ronmi]

Given current working directory /home/user

• go-chromecast load video/a.mp4 works
• go-chromecast playlist video reports zero playable files, thus doesn't work
• cd video; go-chromecast playlist . works
• cd video; go-chromecast playlist /video works

I'll submit a PR for it later.

BTW I'm wondering this is root cause of #64

[vishen]

BTW I'm wondering this is root cause of #64

It very well could be, we don't have great logging or error information in those cases so might be why we aren't seeing anything happen in that instance.