Add further clarifying detail to cloning instructions in README
Remove extra parameter from get_timeline, instead referencing the class variable user_id. get_timeline is only called from an instance of the User class, so it will always have its own user_id.
Revise model.py to match PEP8 standards, changing indentation, breaking up lines that are too long.
Rename tweets_58_42 to tweets.db, and make sure that both references to the sqlite database show the correct relative path in model.py.
Move friends.py into the modules directory 'politwit', and import as a module in flask_server.
Add line spaces and comments to app.js for readability and clarity.
Per Javascript best practices, change indents to 2 spaces.
Add description comment to top of data_viz.
Add comments, change indentation, assign margin to a single value, clean up code.
Note TODOs and annotate classes function from mbostock's bl.ock.
Add comments and annotations, delete defunct AJAX call to get tweets (using Twitter timeline widget instead).
Add docstrings to all functions in flask_server. Refactor display_friends slightly, to move new variables created to the top of the function.
Add comments to explain variables at the top of display_friends

 - initialize searched user as user object
 - empty list, friendlist, for storing friend obj
 - friend_scores, dictionary with initial values, for storing friend information
Cleaned up the optional parameters in User __init__ by making user_id not optional, changing order of parameters.

All uses of User class in flask_server involve providing a value of user_id, and some methods depend on that variable, so making it not optional reaffirms that this value is required to function.
Add more detail to project description.