Added COPYING to make clear that this is a GPL program. Added
copyright notices to both antSearch.py and test_antSearch.py.

Broke TODO from antSearch.py to a separate file (TODO.md)

Began style_guide.md - more for my own memory than anything else.

Began writing ant pre_turn, turn and post_turn tests.
Decided to turn turn_behaviour into documentation.md

Added a load of turn tests for ant class. Possibly a number of
duplicates.
Fleshed out the README.