Added program ddate, discordian date.

ddate converts normal dates to Discordian dates

pkgs/tools/misc/ddate/default.nix

@@ -0,0 +1,20 @@
+{stdenv, fetchgit, cmake} :
+
+stdenv.mkDerivation {
+  name = "ddate-0.2.2";
+  src = fetchgit {
+    url = "https://github.com/bo0ts/ddate";
+    rev = "refs/tags/v0.2.2";
+    sha256 = "1mv7x8g6ddzspcxghzz5dsxrj0x7bw5hc9yvqbl9va9z7nahwv80";
+  };
+
+  buildInputs = [ cmake ];
+
+  meta = {
+    homepage = https://github.com/bo0ts/ddate;
+    description = "Discordian version of the date program";
+    license = stdenv.lib.licenses.publicDomain;
+    maintainers = with stdenv.lib.maintainers; [kovirobi];
+    platforms = with stdenv.lib.platforms; linux;
+  };
+}

pkgs/top-level/all-packages.nix

@@ -693,6 +693,8 @@ let
 
   datamash = callPackage ../tools/misc/datamash { };
 
+  ddate = callPackage ../tools/misc/ddate { };
+
   direnv = callPackage ../tools/misc/direnv { };
 
   discount = callPackage ../tools/text/discount { };