Sort APIImages by most recent creation date.

Fixes #985.
Sort images by tag name when the creation date is the same.

This establishes a strict alphabetical order for tags with the same creation date.
Add workdir support for the Buildfile

For consistency the Buildfile should have the option to
set the working directory.

Of course that is one option more to the buildfile,
so please tell me if we really want this to happen.
fixed postgresql conf setting

small typo, changed listen_address to listen_addresses
Merge pull request #1581 from mhennings/workdirsupport-buildfile

Add workdir support for the Buildfile
Merge pull request #1396 from calavera/985-ordered-api-images

Sort APIImages by most recent creation date.
Merge pull request #1590 from elmendalerenda/patch-3

fixed postgresql conf setting