Merge branch 'master' of https://github.com/Disrado/ArenaEngine

Stable scene graph, tests

Simple changes in interfaces, create-methods, finish existing tests, linking with local gtest-libs work correctly

New test, two tests type

Fixed drawable pool, created nodesCommonPool, new tests, update Layer, RootSceneNode

Merge branch 'dev'

refact SceneNode(tested), create new test(gtest), RootSceneNode class, try create drawable object pull

(idle) Temp commit

Fix drawOrder in Object, check fps

SceneNode && Object

(idle) Try create Node class

(Linkage error)Hard refact SceneNode, TransformableObjects, modify Object

set -> vector, sorting, new construct methods

set -> vector, sorting, update constucr methods

Changed SceneNode (remove/add methods, add typedef)