The HTML version of the .log files links to ClientTest.cpp.html,
colorizes important parts and links to the sync session
directories.
Because it is much more useful than the plain text version, the
nightly.html now links to these .html files.
ClientTest.cpp.html is built with Python pygments if installed,
otherwise some builtin fallback code is used.
All but toplevel Makefile.am are replaced with their non-recursive
counterparts. The generation of configure.in was removed (and thus
configure-{pre,post}.in are also removed) in favor of configure.ac
and m4 macros adding backend specific configure parts.
Version number is generated like in old build system.
There are still many things to improve, but for now there are no
immediate regressions. AUTOTOOLS-TODO contains a list of possible
improvements and fixes. AUTOTOOLS-TESTING contains what was tested
with current build system (configure flags, make options).
