Write a simple Python-based buildbot which receives webhook HTTP calls from hg.pysoy.org, attempts to build and install with waf, and records any warnings or errors. You do not need to handle dependencies (these must be manually installed and updated to the buildbot's sandbox) nor handle any reporting.

While working on this task you should join and remain in #PySoy on Freenode to get help, feedback, and guidance from mentors and other developers. Code updates which may affect your work are also announced here as they happen.

When you've done, commit your work and post the resulting changeset url to this task.