libstd: set baseline stability levels.

Earlier commits have established a baseline of `experimental` stability
for all crates under the facade (so their contents are considered
experimental within libstd). Since `experimental` is `allow` by
default, we should use the same baseline stability for libstd itself.

This commit adds `experimental` tags to all of the modules defined in
`std`, and `unstable` to `std` itself.

Author: aturon

src/libstd/ascii.rs

@@ -10,6 +10,8 @@
 
 //! Operations on ASCII strings and characters
 
+#![experimental]
+
 use collections::Collection;
 use fmt;
 use iter::Iterator;

src/libstd/bitflags.rs

@@ -105,6 +105,7 @@
 //! - `insert`: inserts the specified flags in-place
 //! - `remove`: removes the specified flags in-place
 
+#![experimental]
 #![macro_escape]
 
 #[macro_export]

src/libstd/c_vec.rs

@@ -33,6 +33,8 @@
 //! handled correctly, i.e. that allocated memory is eventually freed
 //! if necessary.
 
+#![experimental]
+
 use collections::Collection;
 use kinds::Send;
 use mem;

src/libstd/collections/mod.rs

@@ -12,6 +12,8 @@
  * Collection types.
  */
 
+#![experimental]
+
 pub use core_collections::{Collection, Mutable, Map, MutableMap};
 pub use core_collections::{Set, MutableSet, Deque};
 pub use core_collections::{Bitv, BitvSet, BTree, DList, EnumSet};

src/libstd/failure.rs

@@ -8,6 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+#![experimental]
+
 use alloc::owned::Box;
 use any::{Any, AnyRefExt};
 use fmt;

src/libstd/fmt.rs

@@ -412,6 +412,8 @@ the `}` character is escaped with `}}`.
 
 */
 
+#![experimental]
+
 use io::Writer;
 use io;
 use result::{Ok, Err};

src/libstd/from_str.rs

@@ -10,6 +10,8 @@
 
 //! The `FromStr` trait for types that can be created from strings
 
+#![experimental]
+
 use option::{Option, Some, None};
 use string::String;
 use str::StrAllocating;

src/libstd/gc.rs

@@ -16,6 +16,7 @@ collector is task-local so `Gc<T>` is not sendable.
 
 */
 
+#![experimental]
 #![allow(experimental)]
 
 use clone::Clone;

src/libstd/io/mod.rs

@@ -216,6 +216,7 @@ responding to errors that may occur while attempting to read the numbers.
 
 */
 
+#![experimental]
 #![deny(unused_must_use)]
 
 use char::Char;

src/libstd/lib.rs

@@ -95,6 +95,7 @@
 //! and `format!`, also available to all Rust code.
 
 #![crate_id = "std#0.11.0-pre"]
+#![unstable]
 #![comment = "The Rust standard library"]
 #![license = "MIT/ASL2"]
 #![crate_type = "rlib"]