The module dl has been deprecated, and has been replaced by ctypes. This
also fixes a problem where the dlopen() flags have different numbers in
different architectures.

This is a workaround for strange entries in sys.path; either dirs that
don't exist, or are in unicode.

This completes all the documentation up to this point.

This modified several docstrings and introduces a quick-start guide.

Now inline() automatically converts known variables (such as property
maps) and defaults to boost::python objects, instead of scxx objects.

The code now is only generated for the current filtered, reversed and/or
directed status of the graph, reducing compile time and binary size.

Edge modification (remove and add) is now protected by a GraphWrap
class, which takes care of the edge index housekeeping, which does not
need to be done by hand anymore.

The function is also no longer bound to one graph, and can take an
arbitrary number of variables of known or unknown types, including
graphs.

Use tr1::tuple instead of boost::tuple to get around maximum tuple size
limit (this requires GCC 4.3). Introduce get_prop<> template function to
facilitate access of property maps from inline C++ code.

Also, get rid of g.underlying_graph(), and rely on "private" variable
g._Graph__graph instead.

A couple of bugs fixed. Local frame dict is read-only in python, so the
updated arguments are returned in a dict instead.

Put the run_action function in a separate submodule, and make it work
properly with the new code.