Bootstrapping for a bunch of older versions of TClasses

[tamasgal]

This is still work in progress. Adds a bunch of bootstrapping code for TH1, TAttText, TPaveText, TLatex, TText` etc.

The need for automating this bootstrapping grows more and more. The problem is that we still don't understand a few things and it's hard to find patterns which can parse the streamer and create the logic.

This branch still does not work for TH1_7 because of a runaway cursor. I have no idea why...