Recreated beforeAndAfter system; changed examples a little; moved vis.pl and main.pl to experiments/prolog/.
Changed training set to uniform training sets with different levels.
Added missing vis and main  files.
Added missing training_sets dir
Draft changes.
update draft with new figures
Merge branch 'master' of https://github.com/edechter/GrammarInduction into prism

Conflicts:
	drafts/cfp/draft.tex