Move BitIterator into root of crate.

src/lib.rs

@@ -181,3 +181,35 @@ impl<T, E> Convert<T, E> for T {
         Cow::Borrowed(self)
     }
 }
+
+pub struct BitIterator<T> {
+    t: T,
+    n: usize
+}
+
+impl<T: AsRef<[u64]>> BitIterator<T> {
+    fn new(t: T) -> Self {
+        let bits = 64 * t.as_ref().len();
+
+        BitIterator {
+            t: t,
+            n: bits
+        }
+    }
+}
+
+impl<T: AsRef<[u64]>> Iterator for BitIterator<T> {
+    type Item = bool;
+
+    fn next(&mut self) -> Option<bool> {
+        if self.n == 0 {
+            None
+        } else {
+            self.n -= 1;
+            let part = self.n / 64;
+            let bit = self.n - (64 * part);
+
+            Some(self.t.as_ref()[part] & (1 << bit) > 0)
+        }
+    }
+}