Fix PKG_CONFIG file name issue

[elite-sheep]

Please refer to #43 for details.

[cessen]

I'll take a closer look after I get home today, but at a quick glance it looks good! I'll likely merge it very soon.

Thanks so much for your time and effort!

[elite-sheep]

Hi Cessen, I am also curious about your plan about this project. Currently it seems that there are a lot works to do, like support custom attributes in OpenEXR header, more compression algorithms and tile output. I can provide some features when I have some time.

[cessen]

Thanks Aaron! I just merged. If you need this urgently, let me know, and I'll cut a release. Otherwise, I'll let this sit for a bit to see if additional things comes in first that can be rolled into a single release.

As for my plans for this project, ultimately I would like it to provide feature-complete bindings for OpenEXR. But realistically, my time and motivation has declined. For the foreseeable future I'll mainly be doing maintenance and merging other people's work, although hopefully I'll get back around to working on this properly eventually.

If you want to contribute additional OpenEXR feature support that would definitely be appreciated! But do keep in mind that my time is going to be limited for the next several months (probably until April or so), so especially complex PRs might take me a while to get to and review. But yeah, I'd be super happy to get more contributions!