name added
Update CONTRIBUTORS

Added name to Contributors group.
Added my name to the CONTRIBUTORS file under calendar.
Add system wiki contributor
Merge pull request #4 from alysonmichele/master

name added
Merge pull request #9 from ZSalerno/master

Update CONTRIBUTORS
Merge pull request #10 from bpatzke/master

Added my name to the CONTRIBUTORS file under calendar.
Merge pull request #13 from aiolos404/master

Add system wiki contributor
updated before marge
Merge pull request #1 from mdipierro/master

Update