Add sendEmails util

An util used to send emails to participants regarding the game.

Change-Id: Ibe557ad2888497a883f20841817658478ac6ccdf
diff --git a/utils/sample.csv b/utils/sample.csv
new file mode 100644
index 0000000..831587f
--- /dev/null
+++ b/utils/sample.csv
@@ -0,0 +1,3 @@
+nom,curs,grau,contrasenya,correu
+Persona 1,3,1,123456,persona1@example.com
+Persona 2,1,4,123456,persona2@example.com