Set version number to 1.0 since core class AutoDiffBlock is quite well-tested
and documented. Prototype solvers and simulators may not yet warrant that
version number, but are stated to be experimental in the README.
The difference between the version number (1.0) and the label (2013.03)
is: The version is time-independent but shows the level of compatibility,
see e.g. <http://www.semver.org>, whereas the label is a marketing tool
which describes the project progress.