Identify simple addresses

[TTitcombe]

The issue

We must be able to identify columns containing simple addresses. Addresses can get very complicated and there any many edge cases that will need considering at some point, however for this first implementation we should only consider "Housenumber streetname" and "post/zipcode" addresses.

British postcodes are of the format LetterLetterDigit[Character] DigitLetterLetter e.g. SW1A 2AA. Common street suffixes are street, road, way, avenue... any others?

Proposed solution

There should exist a function which, when called with a dataframe, returns the names of columns containing simple addresses

Things to consider

• Do not consider address edge cases at the moment.
• Do not consider town names or greater at the moment. I.e. "London" should not be considered a breach of privacy.

[TTitcombe]

Fixed by #6