Added snap

[soumyaDghosh]

Completes #107

[soumyaDghosh]

Hello @alexhuntley kindly check this pull

[kenvandine]

Jumping into this PR hoping to help get the snap into the store. Added a few requested changes.

[alexhuntley]

I haven't submitted Plots to the Snap store because I never figured out how to correctly install the required math font for rendering the equations.

If anyone knows the correct way to do this, I'd love to hear about it. Until I figure this out, the snap package won't work correctly.

[soumyaDghosh]

You can test it by installing te plots snap from snap store. This PR achieves it. Give it a shot and give me some reviews of yours on it. Thanks.

[alexhuntley]

I can't test it right now but thank you for the effort anyway. However judging from the screenshot on the Snap store, the wrong font is still being used for rendering the equations.

[soumyaDghosh]

Is this the font you wanted?

[soumyaDghosh]

@alexhuntley kindly look into the previous comment. I have added the font that you wanted to use.

[soumyaDghosh]

@alexhuntley kindly take the snap package as an official one. I have fixed the font.