Remove deprecated functionality

This removes a large array of deprecated functionality, regardless of how
recently it was deprecated. The purpose of this commit is to clean out the
standard libraries and compiler for the upcoming alpha release.

Some notable compiler changes were to enable warnings for all now-deprecated
command line arguments (previously the deprecated versions were silently
accepted) as well as removing deriving(Zero) entirely (the trait was removed).

The distribution no longer contains the libtime or libregex_macros crates. Both
of these have been deprecated for some time and are available externally.

Author: alexcrichton

reference.md

@@ -1478,19 +1478,19 @@ Constants should in general be preferred over statics, unless large amounts of
 data are being stored, or single-address and mutability properties are required.
 
 ```
-use std::sync::atomic;
+use std::sync::atomic::{AtomicUint, Ordering, ATOMIC_UINT_INIT};;
 
 // Note that ATOMIC_UINT_INIT is a *const*, but it may be used to initialize a
 // static. This static can be modified, so it is not placed in read-only memory.
-static COUNTER: atomic::AtomicUint = atomic::ATOMIC_UINT_INIT;
+static COUNTER: AtomicUint = ATOMIC_UINT_INIT;
 
 // This table is a candidate to be placed in read-only memory.
 static TABLE: &'static [uint] = &[1, 2, 3, /* ... */];
 
 for slot in TABLE.iter() {
     println!("{}", slot);
 }
-COUNTER.fetch_add(1, atomic::SeqCst);
+COUNTER.fetch_add(1, Ordering::SeqCst);
 ```
 
 #### Mutable statics