Added lecture notes on lattice geometry
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 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