solved:
rm -f examples
ln -s examples_solved examples
rm -f workbook_solved.tex
ln -s main.tex workbook_solved.tex
pdflatex workbook_solved
rm -f workbook_solved.tex
skeletons:
rm -f examples
ln -s examples_skel examples
rm -f workbook_skeletons.tex
ln -s main.tex workbook_skeletons.tex
pdflatex workbook_skeletons
rm -f workbook_skeletons.tex
clean:
rm -f *~ *.aux *.log *.toc *.out