auto merge of #11893 : Armavica/rust/copyable-cloneable, r=huonw

I found awkward to have `MutableCloneableVector` and `CloneableIterator` on the one hand, and `CopyableVector` etc. on the other hand.

The concerned traits are:
* `CopyableVector` --> `CloneableVector`
* `OwnedCopyableVector` --> `OwnedCloneableVector`
* `ImmutableCopyableVector` --> `ImmutableCloneableVector`
* `CopyableTuple` --> `CloneableTuple`

src/libstd/io/comm_adapters.rs

@@ -15,7 +15,7 @@ use cmp;
 use io;
 use option::{None, Option, Some};
 use super::{Reader, Writer};
-use vec::{bytes, CopyableVector, MutableVector, ImmutableVector};
+use vec::{bytes, CloneableVector, MutableVector, ImmutableVector};
 
 /// Allows reading from a port.
 ///

src/libstd/io/mem.rs

@@ -17,7 +17,7 @@ use option::{Option, Some, None};
 use super::{Reader, Writer, Seek, Buffer, IoError, SeekStyle, io_error,
             OtherIoError};
 use vec;
-use vec::{Vector, ImmutableVector, MutableVector, OwnedCopyableVector};
+use vec::{Vector, ImmutableVector, MutableVector, OwnedCloneableVector};
 
 /// Writes to an owned, growable byte vector
 ///

src/libstd/io/mod.rs

@@ -302,7 +302,7 @@ use str::{StrSlice, OwnedStr};
 use to_str::ToStr;
 use uint;
 use unstable::finally::Finally;
-use vec::{OwnedVector, MutableVector, ImmutableVector, OwnedCopyableVector};
+use vec::{OwnedVector, MutableVector, ImmutableVector, OwnedCloneableVector};
 use vec;
 
 // Reexports