fix(time): The time crate has moved to out-of-tree.

This adds a dependency on the time crate found in rust-lang/time
and fixes a field rename from tm_gmtoff to tm_utcoff.

add time dependency

tm_gmtoff has been renamed to tm_utcoff
Merge branch 'jgillich-time'
Fix client example so it compiles

`URL::parse()` needs an `unwrap()`, the `let res = ...` needs a semicolon, and I changed the example to set a real header.
Merge pull request #121 from jkleint/patch-1

Fix client example so it compiles
std::from_str has been moved to std::str
TaskPool updates