Add gtb, a lib for getting tracebacks of running greenlets
Add gtools, a collection of small debugging tools for gevent
Make sure everything has a docstring, very minor cleanups
Explicitly set dependencies as microlibs can't find them automatically yet
Add partialorder, a lib containing a partial ordering version of functools.total_ordering
gtb: Fix some spaces-indentation that snuck in
Fix a problem with partialorder test, where local test module overrode installed lib name