Integrate Assignment 1 automarker into the codebase

[So-Cool]

Automarker development is in dev branch in the automarker directory.

To integrate the automarker with the current codebase we need:

• Adjust automarker to use the new folder structure (ailp/library/assignment1_library.pl) and move it to ailp/library.
• If possible merge automarkrc.pl and assignment1_answers.pl to be used as an answer generator for the automarker.
• Update runtest.sh (marking all SAFE submissions at once) to handle the new automarker structure.
• Move assignment1_automarker.md to wiki once it's ready.

---

Possible automarker enhancements:

• Generate marks automatically for the first 4 questions.
• Automarked q6 since we can disable visualisation (and server communication) by

  retract(headless(false)), assertz(headless(true)).
  

• Mark q5b and q6 on various grid sizes by retract/assert grid size.
• Depth or time bound on student answers to avoid failures due to infinite number of answers.