matplotlib Code

expose remaining build options in setup.cfg. See setup.cfg for details

collect config package code in one location in setup.py, so it can
easily be commented out for the next release.

option to disable building backend extension modules moved from setup.py
to setup.cfg

added flags in setup.cfg to disable providing external
packages like pytz and datetime

updated dependency report during build process

move pyparsing back into mpl namespace

remove old version of pytz

added checks that also print version numbers for
pyparsing, pytz, dateutil, configobj

move pyparsing from lib/matplotlib/ to lib/
install pyparsing only if not already available

move configobj.py to lib/, install in site-packages only if required