Update stdlib, compiler, and tests to new kind system

This involved adding 'copy' to more generics than I hoped, but an
experiment with making it implicit showed that that way lies madness --
unless enforced, you will not remember to mark functions that don't
copy as not requiring copyable kind.

Issue #1177

src/test/run-pass/expr-block-generic.rs

@@ -6,7 +6,7 @@
 // Tests for standalone blocks as expressions with dynamic type sizes
 type compare<T> = fn@(T, T) -> bool;
 
-fn test_generic<T>(expected: T, eq: compare<T>) {
+fn test_generic<copy T>(expected: T, eq: compare<T>) {
     let actual: T = { expected };
     assert (eq(expected, actual));
 }