started with simple load/save
Merge branch 'master' into couchdb-container
+ couchdb integration tests enabled
handle DateTime correctly
handle aggrerated properties
clean up
implemented possession relation type in couchdb container
Merge branch 'master' into couchdb-container

Conflicts:
	composer.json
unfinished
natural keys enabled
Merge branch 'many2many' into couchdb-container
many to many implemented
named collections
Merge branch 'couchdb-container'
+ missed exception