restructured additional_material
added .gitignore
added encrypted emails
more examples, first exercise on sheet 2
reorganized exercises
new exercise in sheet 2
new exercise on sheet 2
more examples
added warning to sheet 2
new exercise
two new mystery polytopes
another mystery polytope
finished exercise sheet 2
Text added to scribes.tex
Los primeros cambios de N.N.
Update scribes.tex
Update scribes.tex
Update scribes.tex
Merge pull request #11 from cgiron/master

merged scribes.tex from cgiron
fixed conflicts
fixed conflicts
fixed conflicts