Support local file Data Sources about locuszoom HOT 3 CLOSED

Update: upon further discussion while we would still benefit from a DefaultDataSources object it would be more practical to have this be populated with reliable statgen API endpoints.

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2017 Update

This is an older issue but it still holds that LocusZoom.js lacks an obvious approach to working with local files. However, it's not impossible:

apiBase = window.location.origin + window.location.pathname.substr(0, window.location.pathname.length - "demo.html".length) + "staticdata/";
data_sources = new LocusZoom.DataSources()
    .add("assoc", ["AssociationLZ", {url: apiBase + "assoc_10_114550452-115067678.json?", params: {analysis: 3, id_field: "variant"}}])
    .add("ld", ["LDLZ", { url: apiBase + "ld_10_114550452-115067678.json?" }])
    .add("gene", ["GeneLZ", { url: apiBase + "genes_10_114550452-115067678.json?" }])
    .add("recomb", ["RecombLZ", { url: apiBase + "recomb_10_114550452-115067678.json?" }])
    .add("constraint", ["GeneConstraintLZ", {  url: apiBase + "constraint_10_114550452-115067678.json?" }]);

As of v0.5.6 this approach is demonstrated in index.html using local files.

While this is demonstrated in the repo currently it's not clear that it's there. This issue is resolved when this is documented in the README in the repo as well as on the wiki.

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Update: README and Wiki updated, repo example tuned up. Good enough for now!

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