bulletImplem and SpaceShooter work again
VertexData and Vertex are implemented
VertexManager header is finish, correction of Vertex class : handle just attribute
some change into the vertexManager
replace name VertexData by Data, because it'a also use for an Unifrom class, + place the implmenetation of VertexManager and Vertex into .hpp + add class Pool and PoolElement for representant data on GPU present into VertexManager
Data has a new method to compare, it test each memory block between both (warning : maybe cause performance probleme but not sure)
VertexArray and buffer update for a new usage, include a new optimisation for avoid useless binding + changing of vertexManager functionnement, now work with vertex with pattern close to observer