Write function to translate a path generated by the camera into a path ready for the pen to follow.

[Hsenrab]

A new python file should be added in the core section called utilities and a function called translate_path_for_pen created.

This function takes a path generated by the camera (list of tuples) and translates it by the camera offset. This variable will be calibrated and hard coded into the config file. This can be approximated as 20 mm to start with.

This function should return the new positions (also a list of tuples) [(0,0) , (1,0), ... ]

[Hsenrab]

Target completion date 14/03/16

[Hsenrab]

Create a new branch for this issue off the master branch.