Renames readme and adds dependencies
Several updates to basic_tools and structure

+ Moves all CSV data file to common repo and adds USA data
+ Adds method to look up CSV file using keys e.g UK USA
+ Adds rcfile to improve look of plots
+ Adds support for country selection
+ Improves distance time plot
+ Adds velocity distribution plot
Adds git ignore
Places all results files in single dir

This creates a single directory to maintain all results files,
corresponding changes to reflect this are made to basic_tools.py
Initial start of file for all postcodes