scipy: adding 0.14.0rc1 as --devel
matplotlib: install pyparsing/dateutil as external

Passing `--single-version-externally-managed --record=installed.txt` to
the `python setup.py` of these python packages.
numpy: We force brewed python

The system python has severe bugs when later on scipy is installed. I
was not able to rule them out. Please help, if you have got a better
idea. Also system python has already got an (old) numpy and scipy.
numpy: remove outdated comment.

numpy uses `FC` var now.
numpy: style bits