If you download and install this version, `pdf2htmlEX -v` actually shows
v0.9, this is due to my naive git branch model. Please contact me if
this is too annoying to you. I'll fix it.
This is a quick fix for v0.8, except for `--optimize-text` is turned off by default. This parameter turns out to be still buggy, I'll try to fix it in the next release.
The next release will be focused on optimization, mainly about background images. The idea is to use a number of rectangle to cover occupied areas, instead of a big-whole image for each page. The second step would be combine the rectangles together, and use something like CSS sprite or CSS clipping in order to reduce the number of requests.