single: Configurator; IConfigurator
A configurator is an object which configures several components of Buildbot in a coherent manner. This can be used to implement higher level configuration tools.
configure(config_dict)
Alter the buildbot config_dict, as defined in master.cfg
like the master.cfg, this is run out of the main reactor thread, so this can block, but this can't call most Buildbot facilities.