added files and fixed tox.ini for jenkins setup

Added files needed for jenkins setup:

- `jenkins-job-config.xml` -- configuration file for a tox builder jeknins job. This can be read into jeknins to create a new job.
- `jenkins.sh` -- wrapper script that installs requirements, runs test, and generate coverage and pylint output.
- `pip-install.py` -- utility program for installing python packages.
- `pip-req.txt` -- list of python dependency packages.

Added two additional testenv sections for jenkins setup in the tox.ini file: `py26-jenkins` and `py32-jenkins`.