Support no_std in nodrop

[gereeter]

See #20.

[gereeter]

Ah - you are testing against Rust 1.2, which doesn't have stable core. Should I put this behind a cargo feature?

[bluss]

Right, we need a solution for that. Nice crate that doesn't need anything from std.

I want to use a std feature and have it enabled by default. There was some discussion about what the community's standard solution for this was going to be, but I think that's fine.

Moving the baseline from Rust 1.2 is fine, but not all the way up to Rust 1.6 yet I think?

Discussion in rust-lang/libc#146

[bluss]

Heck, I think Rust 1.6 is fine, we can do a bump to version 0.2. This crate doesn't take any harm from 0.1 -> 0.2 bumping does it, it doesn't share types really with other crates, so the implications should be minimal.

[bluss]

To edit that thought, that makes it complicated for ArrayVec.. where a major version bump has larger ramifications..

[bluss]

Thanks. I'll merge this & fix it up.