Add option to directly link to mapping results

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Description

Currently it's not possible to link to mapping results, so I'm adding a feature where you can get a "Share" link to allow other people to see your results.

The way I'm currently doing this is to link an ID (generated as a hash from the mapping inputs) with JSON of all the options/sample-data/filenames. A URL with that ID as input will then just pull all the options and output files and show the results.