use association order to determine subsummits
give more explanation to what happens
provide some explanation comments
correct 1-hop sub-parking inclusion
better handling of relations between docs
more explanation of what we are trying to do + some improvements / corrections
correctly display association tools
some more explanation (more missing)
Correctly order linked docs
correctly get document level for proper hierarchy display
hierarchy display

compensate additional offset after first insertions
try to use better function names
cleanng
Merge branch 'hierarchy-hell'

Conflicts:
	lib/model/doctrine/Summit.class.php
bad merge conflict resolution
boat icons
boat pt integration
correct svg file
boat picto print
typo