Close #53: Respect config folder dependency chain when reading configurations

Was mostly implemented, but not obvious from the code structure and
output. Restructure the code to read all data in correct order, move
printouts to reflect parsing chain.
Merge branch 'master' of github.com:Eyescale/Buildyard
Merge pull request #63 from eile/master

Close #53: Respect config folder dependency chain when reading configurations