1.6.8
Don't throw an exception when getting/setting 'href' for relation types that it doesn't make sense for.

Just allow it to be set as a regular property so it's effectively a "don't care". Prevents a brutal failure when someone goes:

assetGraph.findRelations({...}, function (relation) {
    relation.hrefType = 'absolute';
});

... without checking the type of each relation instance.
Update jsdom to 0.10.0.
Added test case
Added 'strict'-boolean on JavaScript asset...

to keep track of global strict mode expressions