ergonomics and added features

[magnusuMET]

This PR makes the crate more ergonomic for users, and adds some missing functionality such as unlimited dimensions.

Removed:

• mutex from netcdf-sys
• direct access to internal structures

Changed:

• getters and setters for dimensions/variables/attributes
• funtions returns a netcdf::Result
• functions now take Option<&[usize]> for indexes/sizes
• ndarray is now feature gated
• tests produces files in a temporary directory

Added:

• can open from any Path-like item
• Deref and DerefMutfor the file makes adding and accessing variables/dimensions easier
• unlimited dimensions
• read from a memory slice (feature gated due to travis netcdf version)
• tests

[magnusuMET]

Thank you for the review @bluss! I think the PR is ready to be merged, and published to crates.io

[bluss]

Nice. I'm just coaching here. Now that it's ready for merge, I'd go back to the PR title and description and edit them to make sure they match the updated content of the PR. For example, the title should be updated. I'd ask for a summary of removed, added and changed features.

[mhiley]

I'm good with 0.2.0. Thanks for all the feedback @bluss and awesome work @magnusuMET ! Just confirming one more time since there's been a little more action, are we ready to merge?

[magnusuMET]

We are almost ready, I would like to change the title and description for the PR

[mhiley]

Ok sounds good - @magnusuMET you should've received an invite from crates.io to allow you to publish the crate. This way you don't have to wait on me.

[magnusuMET]

@mhiley Updated and ready to merge! Still haven't gotten the invite, so you may go ahead and publish.

[magnusuMET]

Oh, and this also closes #13, #14

[magnusuMET]

And #11 can be closed, along with #16 when the new version is published

[milesgranger]

Awesome work @magnusuMET and I really appreciate the time taken by @bluss in your detailed review; always learning from your contributions! 👏

[mhiley]

published to crates.io as v0.2.0 and tagged repo v0.2.0 🎉 Let me know if there are any problems with the published crate.