Log Message:
Update to 0.11:

     o   Lots of bugfixes.

     o   The bt_pkgflags module was added, which provides a replacement for
         the pkg-config utility (not compatible).

     o   The bt_msg_summary() function was added to bt_config, which provides
         an homogeneous way to output diagnostic messages at the end of the
         configuration process.

     o   The bt_err() function in bt_config does not accept error codes any
         more as its first argument.

     o   The buildtool(1) manpage was rewrote, including a simple user refer-
         ence so people can easily learn how to build packages without having
         to dig into the big manual.