New Entity filter by tag tested
Some tests
Graphnode integrated in EntityData
Graphnode component rm
Graphnode fully integrated into entitydata
Demos ported with new graphnode implementation
Merge branch 'master' of https://github.com/PFA-OpenGL/OpenGL-Game-Engine into graphnode
Readme updated
Copy of entities and entity data
Merge pull request #90 from PFA-OpenGL/graphnode

Graphnode
Bug fixed : bug was due to copy operator of entitydatas
dependency manager return std::shared_ptr and are linked with parents
Merge pull request #95 from PFA-OpenGL/dependencies-manager-improvement

dependency manager return std::shared_ptr and are linked with parents
merge with master
merge ok