modified .gitignore
Primeros cambios en el N.N.
Merge branch 'master' of github.com:julian-upc/discrete-geometry-lecture-notes
Merge branch 'turbod89-master'
compiled lecture notes
Merge pull request #24 from turbod89/master

Scribes & sheet5
Problems Sheet2
lecture 6
Added the source codes for generating all the polytopes in sheet 4
Merge remote-tracking branch 'upstream/master'
Added Alex's encrypted solution to sheet 4
Merge branch 'master' of https://github.com/XaviTapia/discrete-geometry-lecture-notes into XaviTapia-master
included lecture 6 into main file
Merge branch 'alex-alvarez-master'
Added solution to sheet 5
Added lecture notes on lattice geometry
Added Alex's referee
Resum of the paper
Merge branch 'master' of https://github.com/XaviTapia/discrete-geometry-lecture-notes
Added my part of the lecture notes and the problems I have solved.