threadpool: update to std::future (#1219)

An initial pass at updating `tokio-threadpool` to `std::future`. The
codebase and tests both now run using `std::future` but the wake
mechanism is not ideal. Follow up work will be required to improve on
this.

Refs: #1200

1 files changed, 1 insertions, 1 deletions

diff --git a/Cargo.toml b/Cargo.toml
index 7d93dcaf..4b14d077 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -14,7 +14,7 @@ members = [
   # "tokio-signal",
   "tokio-sync",
   "tokio-test",
-  # "tokio-threadpool",
+  "tokio-threadpool",
   "tokio-timer",
   "tokio-tcp",
   # "tokio-tls",