0.5.0

[fgrehm]

Just waiting for new trusted images to be built on docker's index for a new release.

Once this is in, we can close the following issues:

• GH-53
• GH-52
• GH-51
• GH-50
• GH-43
• GH-42
• GH-43

[fgrehm]

For those interested, new images have been built. I'm just going to do some manual testing and will release afterwards.