Added Alex's encrypted solution to sheet 3
Merge pull request #21 from alex-alvarez/master

Added Alex's encrypted solution to sheet 3
First version of notes for class on Dec 13th
Merge pull request #22 from vrede/master

First version of notes for class on Dec 13th
Final version of exercise sheet 3
Merge pull request #23 from vrede/master

Final version of exercise sheet 3
Merge https://github.com/julian-upc/discrete-geometry-lecture-notes
A first tentative of Daniel's scribes. Also a figure commented in lecture5.tex for latex compiling.