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.
Merge pull request #25 from cgiron/master

direct_sum.cc update, final version; exercise solutions
Merge pull request #28 from alex-alvarez/master

Added solution to sheet 5 and referee
Merge branch 'master' of https://github.com/XaviTapia/discrete-geometry-lecture-notes into XaviTapia-master
Merge branch 'master' into XaviTapia-master
moved paper
removed dummy file
Merge branch 'master' of https://github.com/BorjaElizalde/discrete-geometry-lecture-notes into BorjaElizalde-master
incorporated lecture notes Borja
cleaned up after Borja
Referee paper CGiron