Almost no change in this commit
Merge branch 'master' into parser
First major changes to parser
Implemented LL(1) grammar parsing
Fixed quite a few bugs
Re-implemented construction of a S-Expression tree, with a more
sophistacted and a better implementation.

Some minor bug fixes w.r.t to Parse table
Implemented printing of List.
Fixed some lists related bugs.
Cleaned up some of the unused code.
Added new test cases.
Extensive tested code.
Some minor fixes and merged test cases.

This probably is the last commit made on this branch.
Created README and Runfile for submissions.
Darn, I missed doing git add -u!!
This commit should have been part of the last one.
Fixed handling of special case () ==> NIL ==> (()) ==> (NIL)
Some changes to readme