Changed the handling of variadic intrinsics a bit. Removed the -fp80 option and made real be 80bit floats on X86, this is what the D spec really says it should be and fixes a bunch of issues. Changed the handling of parameter attributes to a bit more generalized approach. Added sext/zext attributes for byte/short/ubyte/ushort parameters, fixes #60 . Parameter attribs now properly set for intrinsic calls if necessary. Made the tango.math.Math patch less intrusive. Fixed/added some mini tests.

--- a/import/llvmdc/cstdarg.di	Fri Aug 01 01:12:33 2008 +0200
+++ b/import/llvmdc/cstdarg.di	Fri Aug 01 17:59:58 2008 +0200
@@ -22,8 +22,8 @@
 pragma(va_arg)
     T va_arg(T)(va_list ap);
 
-pragma(va_intrinsic, "llvm.va_end")
+pragma(va_end)
     void va_end(va_list args);
 
-pragma(va_intrinsic, "llvm.va_copy")
+pragma(va_copy)
     void va_copy(va_list dst, va_list src);