Add tool that can take to student files and output a plain text diffs of what changed between then

[hawkrives]

This tool should include things like course a grade change from B to A or etc.

There should be a similar tool, that takes two area specification files, and outputs the differences between them.m

Finally, there should be a tool that takes to audit reports and I'll put the differences between them, taking into account the differences between the input data files and specification files.