Add support for == operator on Termios

[conradkleinespel]

Hi David,

Thanks a lot for publishing these bindings. These save me a lot of time! 😃

The current code does not compile with the latest rustc. In this PR, I make some minor changes so it compiles again. The changes include removing the #[allow(unstable)] lint, which has been removed. And I remove some extern crate libc lines which seem unnecessary.

Finally, I added support for using the == operator on Termios structs. This comes in handy for testing: for instance, if a library changes the TTY settings, I can test that the original TTY state is restored correctly with the == operator at the end of the test.

Please let me know if you have any questions 😉

Best regards,
Conrad

[conradkleinespel]

Anything I can help you with, @dcuddeback ?

[dcuddeback]

@conradkleinespel Thanks for sending me these updates. I let my rustc get a little out of date, because I have it setup as a cross-compiler for my Raspberry Pi, which requires compiling Rust from source every time I update. Looks like it's time for me to update my compiler again. Sorry for not responding to this PR sooner. I didn't receive any notifications from Github when you first opened the PR, so I had no idea it was here until this morning.

[conradkleinespel]

@dcuddeback Thanks a lot for having had a look at this and merging it. I figured about the Github notifications, which is why I pinged you with your username. I'm just glad you took time out of your day to have a look at the contribution 👍

And thanks again for putting these bindings together 😃

Do you mind me asking what cool things you do with Rust on the Pi ?

[dcuddeback]

@conradkleinespel I'm glad that you found the bindings useful. I don't have much running on my Pi with Rust yet. I'm using these termios bindings to talk to an USB ZWave controller to control my bedside lamp. I currently have a C++ program running that slowly turns on my light at 6:30 each morning. I'm working on rewriting it in Rust. The C++ project is here: https://github.com/dcuddeback/zwave-sunrise

Btw, I pushed up your changes as version 0.0.2 to crates.io.

[conradkleinespel]

@dcuddeback That's cool ! 👍 And thanks for the crates.io update :-)