Added gitignore
Normalized line endings
Constant variable in all caps

Changing the code in the notebook seems to have unpredictable effects on
the .ipynb code... not sure I like it
Create initial_data_cleaning.py file
Use consistent missing value
Move key functionality into separate functions for readability
rename ambiguous "fullyMerged"
More minor renaming
more verbose lowercase function names
Fix people/persons typo
Create new IPython notebook which imports from .py file

This offloads the heavy-duty work to a .py file which is much easier to
work with (at least for me) while still showing results in a prettier
IPython environment
use lower_case instead of upperCase
last little bit of lower_case
Create util.py to hold useful nonspecific functions
Count unique values in each column

Could be useful to distinguish categorical variables from numeric
variables. I'd estimate that anything with more than 10 unique values is
numeric
Merge remote-tracking branch 'upstream/master'
Merge pull request #2 from Vadskye/master

Minor git upkeep and refactoring