Replace unexported meta tags with attributes

Issue #487

src/comp/back/link.rs

@@ -249,6 +249,8 @@ mod write {
  *
  */
 iter crate_export_metas(&ast::crate c) -> @ast::meta_item {
+    // FIXME: Need to identify exported attributes as described above,
+    // reevaluate how the above strategy fits in with attributes
     for (ast::attribute attr in c.node.attrs) {
         put @attr.node.value;
     }

src/comp/rustc.rc

@@ -5,9 +5,8 @@
 #[vers = "0.1"];
 #[uuid = "0ce89b41-2f92-459e-bbc1-8f5fe32f16cf"];
 #[url = "http://rust-lang.org/src/rustc"];
-
-meta (desc = "The Rust compiler",
-      license = "BSD");
+#[desc = "The Rust compiler"];
+#[license = "BSD"];
 
 
 use std (name = "std",

src/lib/std.rc

@@ -2,9 +2,8 @@
 #[vers = "0.1"];
 #[uuid = "122bed0b-c19b-4b82-b0b7-7ae8aead7297"];
 #[url = "http://rust-lang.org/src/std"];
-
-meta (comment = "Rust standard library",
-      license = "BSD");
+#[comment = "Rust standard library"];
+#[license = "BSD"];
 
 // Built-in types support modules.