Notebooks  4A, 4B
Day 4 census nb
Clarify part of the notebook
Day 4
Add Day 4
Merge branch 'master' of https://github.com/rdhyee/working-open-data-2014
Day 5 slides
Some work
Merge branch 'master' of https://github.com/rdhyee/working-open-data-2014

Conflicts:
	notebooks/Day_04_A_PfDA.ipynb

 Changes to be committed:

	modified:   notebooks/Day_04_A_PfDA.ipynb
	new file:   notebooks/Day_05_A_Geographical_Hierarchies.ipynb
	new file:   notebooks/Day_05_A_Geographical_Hierarchies.py
	new file:   notebooks/Day_05_B_Geographical_Hierarchies.ipynb
	new file:   notebooks/Day_05_B_Geographical_Hierarchies.py
	new file:   notebooks/Untitled0.ipynb
Day 5 work in class
	new file:   notebooks/PY_Day_05_A_Geographical_Hierarchies.ipynb