Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.

Reworked the LLVMDC specific pragmas.

runtime/internal/qsort2.d

@@ -0,0 +1,70 @@
+
+/*
+ * Placed into Public Domain
+ * written by Walter Bright
+ * www.digitalmars.com
+ *
+ * This is a public domain version of qsort.d.
+ * All it does is call C's qsort(), but runs a little slower since
+ * it needs to synchronize a global variable.
+ */
+
+/*
+ *  Modified by Sean Kelly <sean@f4.ca> for use with Tango.
+ */
+
+//debug=qsort;
+
+private import tango.stdc.stdlib;
+
+struct Array
+{
+    size_t length;
+    void*  ptr;
+}
+
+private TypeInfo tiglobal;
+
+extern (C) int cmp(void* p1, void* p2)
+{
+    return tiglobal.compare(p1, p2);
+}
+
+extern (C) Array _adSort(Array a, TypeInfo ti)
+{
+    synchronized
+    {
+        tiglobal = ti;
+        tango.stdc.stdlib.qsort(a.ptr, a.length, cast(size_t)ti.tsize(), &cmp);
+    }
+    return a;
+}
+
+
+
+unittest
+{
+    debug(qsort) printf("array.sort.unittest()\n");
+
+    int a[] = new int[10];
+
+    a[0] = 23;
+    a[1] = 1;
+    a[2] = 64;
+    a[3] = 5;
+    a[4] = 6;
+    a[5] = 5;
+    a[6] = 17;
+    a[7] = 3;
+    a[8] = 0;
+    a[9] = -1;
+
+    a.sort;
+
+    for (int i = 0; i < a.length - 1; i++)
+    {
+        //printf("i = %d", i);
+        //printf(" %d %d\n", a[i], a[i + 1]);
+        assert(a[i] <= a[i + 1]);
+    }
+}