Without this:

    error: failed to select a version for `serde_test_suite`.
        ... required by package `serde_test_suite-tests v0.0.0`
    versions that meet the requirements `= 0.0.0` are: 0.0.0

    the package `serde_test_suite-tests` depends on `serde_test_suite`, with features: `serde` but `serde_test_suite` does not have these features.

    failed to select a version for `serde_test_suite` which could resolve this conflict

Seems like a Cargo bug -- I will minimize and report.

These hit a strange error in our Emscripten builder in Travis as well as
locally through cargo web:

    ERROR: failed to execute cargo: Resource temporarily unavailable (os error 11)

They aren't needed. This makes the macro a bit simpler

Don't use variable names

Fix a compile error in derive(Deserialize) with no_std + alloc