REMIND: Initial setup of remind

Remind is a calender application that I hope will replace calcurse at
some point.

Currently, nothing is added. I want to check that secret.rem files are
successfully encrypted using git-crypt before adding anything

.gitattributes

@@ -1 +1,2 @@
 *.secret filter=git-crypt diff=git-crypt
+*.secret.rem filter=git-crypt diff=git-crypt

remind/.config/remind/remind.rem

@@ -0,0 +1,3 @@
+include /home/jonathan/.local/share/remind/birthdays.secret.rem
+
+REM 10 Oct MSG Test