auto merge of #6106 : thestinger/rust/iter, r=bstrie

I don't have a strong opinion on the function vs. method, but there's no point in having both. I'd like to make a `repeat` adaptor like Python/Haskell for turning a value into an infinite stream of the value, so this has to at least be renamed.

diff --cc src/libcore/task/mod.rs
Simple merge

diff --cc src/libstd/base64.rs
Simple merge

diff --cc src/libstd/timer.rs
Simple merge

diff --cc src/libstd/uv_iotask.rs
Simple merge

diff --cc src/test/run-pass/extern-stress.rs
index 1add9d44d9a287cdd681d24f86cceef7879487dd,379d88fbd7675c53c810a7848ace0f4ba558ff7d..1a1e0ca7b6d9bc42e123d526928a9c4862b57dcb
--- 1/src/test/run-pass/extern-stress.rs
--- 2/src/test/run-pass/extern-stress.rs
+++ b/src/test/run-pass/extern-stress.rs
@@@ -34,9 -34,9 +34,9 @@@ fn count(n: uint) -> uint 
  }
  
  pub fn main() {
-     for old_iter::repeat(100u) {
+     for 100u.times {
          do task::spawn {
 -            assert!(count(5u) == 16u);
 +            assert_eq!(count(5u), 16u);
          };
      }
  }

diff --cc src/test/run-pass/extern-yield.rs
Simple merge