* Remove scaling font height/width with size of font bounding box
* Refactor LTChar bounding box computation
* Change expected outcome of `python tools/pdf2txt.py samples/simple3.pdf`, because it looks like an improvement. However, when I view `samples/simple3.pdf` I don't see any text at all. The change in expected outcome is explained by the fact that the bounding boxes of characters can be different, depending on the `/FontBBox` parameter of the font.
* Add test for font sizes, and for this a high-level function that returns an iterator of LTPage objects
* Add line to CHANGELOG