Fixes compiler errors for bot management via pid
Adds global functions for bot administration

Adds extern "C" block to define global-level bot administration hooks;
they're not name-mangled by g++, so Python's C FFI can detect and run
them easily.
Implements Cython wrapper around C++ bots

Implements a basic Cython extension class around the bots::user class,
so that it may be accessed from Python
Creates Python package structure

Minor tweaks to Makefile