Completed task 1
Corrected logical error (task 3)

The error did not cause the program to produce incorrect results per
se, but when setting MIN to a number greater than one would cause
invalid random numbers to be generated.
Adapted task 3, chapter 7 for task 2, oblig 2
Adapted task 4, chapter 7 for task 3, oblig 2
Adapted task 5, chapter 7 for task 4, oblig 2
Added Makefile
Added stubs (task 5)
Completed task 5
Small refactoring to improve readability (task 1)
Improved makefile tar target

* Mark as phony target
* Rename to "tar"
* Unpack in a subdirectory
Merge branch 'oblig2'