[svn r98] Added support for std.c.stdlib.alloca via pragma(LLVM_internal, "alloca").

Added support for array .sort and .reverse properties.
Fixed some bugs with pointer arithmetic.
Disabled some DMD AST optimizations that was messing things up, destroying valuable information.
Added a KDevelop project file, this is what I use for coding LLVMDC now :)
Other minor stuff.

test/alloca1.d

@@ -0,0 +1,15 @@
+module alloca1;
+
+pragma(LLVM_internal, "alloca")
+void* alloca(uint);
+
+void main()
+{
+    int n = 16;
+    int* p = cast(int*)alloca(n*int.sizeof);
+    int[] a = p[0..n];
+    a[] = 0;
+    foreach(i,v; a) {
+        printf("a[%2d] = %d\n", i, v);
+    }
+}