pavement:

General code cleanup (comment-out code and trailing whitespace).
pavement:

Added copyright statement, since we are making modifications.
pavement:

pep8/pyflakes cleanup
pavement:

Refactored `start` tasks such that the app/environment can be stopped/
started without syncdb errors (and without having to re-bootstrap
everything).
fabfile:

Slight refactoring of bootstrap and start functions to use modified
paver tasks... which results in cleaner environment handling and
avoids some syncdb errors when stopping/restarting the app.
README.rst:

Revised fab instructions for environment handling.
Merge pull request #78 from larsbutler/fab-improvements

Improvements to fabfile

[r=nastasi-oq]