Assets pipeline V0.0

An assets pipeline implementation.
This is not perfect but offer better flexibility and huge loading time saving.
All old assets class has been removed and replaced with new one.
In /Tools you will find a project who allow you to convert assets to .cpd. There is some examples in the `DemoScene.cpp`.
Normally assets are already converted and on the Dropbox (you will have too update it) If you encounter problems at load it's maybe because your computer do not have the same endian. So you will have to convert assets yourself (see /Tools/AssetsConvertor).

Load is approximately divided by 10 or more with serialized assets.