Add planned dependencies
Add pseudocode .py files and dependencies to README

amazon-wishlist-tools.py
    Main .py file - imports others and runs them
    Print output to terminal

arg_parser.py
    Arguments are defined in this file

get_wishlist.py
    Use beautifulsoup to scrape the data from the wishlist page
Add vim .swp files to .gitignore
Add initial tests for amazon_wishlist_tools.py

Tests are located in test_amazon_wishlist_tools.py and will eventually
be moved into a test directory (once I figure out how to do this).
Initial tests are for amazon_wishlist_tools.prettify(), and so far only
test one success case and one failure case - prettify() should fail when
an empty dict is passed to it.

Add details of the structure of dict returned by
get_wishlist.parse_page() for future reference

Rename amazon-wishlist-tools.py to amazon_wishlist_tools.py due to
python's preferences for underscores over dashes in module names