I wondered how to create an epub version of the neo4j manual (I want to read it outside on my ebook reader while its still summer). User nawroth pointed out the missing piece on stackoverflow.
Here is what I've done in the end:
apt-get install dbtoepub git clone https://github.com/neo4j/neo4j.git cd neo4j mvn clean install -DdocsBuild -Ddebug -Dlicense.skip=true -Dlicensing.skip cd manual/cd target/ ln -s src/images . dbtoepub neo4j-manual-shortinfo.xml
Here is the resulting neo4.epub file. Hope thats ok with the neo4j people.