make_zip.sh: delete the CMake cache file CMakeCache.txt from last build
to ensure a fresh configuration.
Synchronized both variants of CSS.
Added test case with some articles. Updated the required DB.
Added some articles to the default database. Corrected some test cases
to match the changed DB some_articles.csv.
maker: Corrected calling makeindx. Updated version number.
pex: Fixes #1: Only subsection titles are printed any more.