[boost] CIA hooks for Boost IRC channel

CIA is an mechanism how commits to open source projects can be announced on IRC channels for the corresponding project. It's a great way to keep everybody informed about what's going on, and in nicely complements commit emails -- since IRC audience not necessary reads commit emails, and IRC messages are more convenient to get rid of ;-) What would people say about setting up such thing for Boost? It basically requires adding another post-commit hook, which is a small Python script. The docs can be found at: http://cia.vc/doc/ and the script can be found at: http://cia.vc/clients/svn/ciabot_svn.py and if this idea sounds worthwhile, I can provide a version of that script with Boost-related properties filled in. - Volodya