zc.buildout logger.  This reduces noise in the output.  This change
was so far reaching, I decided to go ahead and clean up lots of log
messages, adding some missing periods and adding quotes around
requirement strings and file paths.

in easy_install.py, added logging to show why distributions are added
in verbose mode and removed recusive code to show requirement chains
when errors occurred.

be specified in a versions section.

Changed the log format for picked versions.