Add acceptedStudentsCSVExport function to stats.py script. This funtion is used to generate CSV with all accepted students. It still needs some work and I left TODOs there. I also added helper function for saving data to CSV, which can be reused for other kinds of reports.

import os, sys
sys.path.insert(0, os.path.dirname(os.path.dirname(__file__)))
import pkg_resources
pkg_resources.require('WebOb')