Merge pull request #1 from CookieH/master

Update  fork
Creation of GridNavigate class - Needs Documenting
Adjustment of Line Dancing class - Status changes from private to
protected in some fields and introduction of optimisation for line
following methods
Documentation and bug fixes
Updated documentation on the Distance class
Updated documentation for Distance class.
Merge pull request #3 from DaveM214/master

Merge GridNavigation and Documentation