Merge pull request #1 from julian-upc/master

actualize
commit de prueba
Merge branch 'master' of https://github.com/ideparada/discrete-geometry
output borrado
eliminada carpet de prueba
sheet2
Merge pull request #3 from julian-upc/master

actualize 5.12.
Merge pull request #8 from julian-upc/master

Actualitzar
Merge pull request #1 from julian-upc/master

actualize
Merge pull request #106 from arnauplanas/master

Advances sheet3
Revert "Advances sheet3"
Merge pull request #107 from julian-upc/revert-106-master

@arnauplanas: Revert "Advances sheet3"
Updated sheet2 pdf
Updated sheet2 readme
Added sheet3 pdf
Added sheet3 readme
Added sheet3 code
Updated TestChi
Added Orbit.sage
Added encrypted LogOrbit