[ld] add list-facts-handler, add get-facts to IGraphAccess and implement, remove doubly nested :body from edn-response, bugfix fact map parsing in add-facts-handler
[ld] add list-facts-handler, add get-facts to IGraphAccess and
implement, remove doubly nested :body from edn-response, bugfix fact map
parsing in add-facts-handler

thi-ng/fabric