Added support for the D programming languge.

It is still a bit rough around some edges, particularly with regard to multi-threading and operator overloading, and there are some documentation bits missing, but it should be fine for basic use.

The test-suite should build and run fine with the current versions of DMD, LDC and Tango (at least) on Linux x86_64 and Mac OS X 10.6.

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@12299 626c5289-ae23-0410-ae9c-e8d60b6d4f22

Examples/test-suite/d/sneaky1_runme.2.d

@@ -0,0 +1,11 @@
+module sneaky1_runme;
+
+import std.exception;
+import sneaky1.sneaky1;
+
+void main() {
+  enforce(add(30, 2) == 32, "add test failed");
+  enforce(subtract(20, 2) == 18, "subtract test failed");
+  enforce(mul(20, 2) == 40, "mul test failed");
+  enforce(divide(20, 2) == 10, "div test failed");
+}