move package.json to root directory In the future we'll probably use it to manage more then just less/css stuff. So the less directory is the wrong place. The most common place is the root directory, so lets put it there. Also, this way the --prefix parameter for npm is no longer required.

# requirements.txt file for use as "pip install -r requirements.txt" as a
# readthedocs compatible alternative to "pip install -e ." which is a working
# alternative to "setup.py develop" which doesn't work with Mercurial 3.7
.