Rebirth engine integration part one

The integration of rebirth engine is almost finished. Briefly, the first iteration was to override all the function of Direct X to have a null renderer and reconnect one by one all the functions. For now the screen is black because I have to update the rebirth engine to include better management of dynamic vertex buffer. I have decided to do as the source engine like a begin mesh, a series of add vertex or push vertex and finally a end mesh. It's pretty simple and game code is relatively easy to understand and use. I'll send a few pieces of code to explain it all..