Adding a paste printer, tree-style. For testing.
Adding a decorators module, testing some debug logging.
Cleaned code, better logging msgs on errors, bugs

responses.py, htmltools.py have better logging.
some code was cleaned, removed to make things clearer.

phonewords had a bug, where passing invalid url args
caused a ValueError.

paste app has better listings now. replies are included.

pastetree.py was added, an example of walking pastes
and paste children.

decorators.py was added, future testing/development
for logging errors.

utilities.logtraceback() will log the latest traceback
with more info than just the exception msg.