ddb.min.css removed from main layout.
Images path read from config file
Header in progress.
heading inline-block.
Merge remote-tracking branch 'origin/DDBNEXT_TBS' into develop

Conflicts:
	grails-app/views/_mainHeader.gsp
Merge branch 'develop' into DDBNEXT-9
Left bar + top bar
Use proxy on production through external file
header refinements.
Merge branch 'develop' of https://github.com/Deutsche-Digitale-Bibliothek/ddb-next.git into develop
General page done
Merge branch 'develop' into DDBNEXT-9
Merge branch 'develop' into DDBNEXT-9
config file
Starting CSS
Little changes for default elements
show backend version number in footer
Starting CSS
Merge branch 'DDBNEXT-9' of https://github.com/Deutsche-Digitale-Bibliothek/ddb-next.git into DDBNEXT-9
Merge branch 'develop' into DDBNEXT-9