there seems to be a disturbing lack of documentation(force) there. So does google I am afraid, so If anyone has any good advices about it please share.
There are no Qt4.8 docs yet because Qt 4.8 is in technical preview stage at this moment.
You should use the 4.7 docs instead and have a look at the changelog.
4.7 does not provide the src/plugins/platforms/* which from my current understanding has to do with the introduction of lighthouse inside the qt ecosystem.
