Fixes issues reported by Mulkave

* Fix issue #6 where Node::getProperties returned `key=>true` instead of `key=>value` pair
* Fix issue #7 possibility to add multiple labels at once
* ListIndex output improvement, fix issue #9 
* Changed Parameter order in getPathBetween method, fix issue #10 
* You can now specify the internal nodeId in the startNode and endNode arrays of getPathBetween fix issue #11