Adding .gitignore and removing .pyc files.
Update package name in README
Add setup.py and move things to an installable popgen package.
Removing unused drawing_households.py.
Cleaning up imports.
PEP8 cleanups.
Adding Travis-CI config.
Adding contributor guidelines.
Move demo stuff into a demos folder

[ci skip]
Update demo notebook

[ci skip]
Merge pull request #2 from synthicity/setup

Several misc. setup tasks
Starting on IPU implementation with function for the quality metric.
Function for calculating new household weights.
Add class for handling the frequency table in a sparse manner.
Add function for calculating average fit quality across all household/person types.
Add function that does the IPU iteration to get final household weights.
includes additional IPF functions and the popgen_test_run notebook for data prep, IPF, IPU
addition of test data to be used with popgen_test_run.ipynb
pep8 formatting update
moved test notebook to demos