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.

tests/mini/union3.d

@@ -1,6 +1,5 @@
 module union3;
 
-pragma(LLVM_internal, "notypeinfo")
 union vec3
 {
     struct { float x,y,z; }