createUserImport should pass an absolute path to webpack.addDependency

[stephanwilliams]

webpack expects an absolute path.

Fixes #211 .

I updated the relevant test as well and npm run test succeeds, are there any other issues?

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This change is 

[justin808]

This looks really great.

@Judahmeek, maybe take a peek at this.

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Reviewed 2 of 2 files at r1.
Review status: all files reviewed at latest revision, all discussions resolved.

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Comments from Reviewable

[justin808]

@stephanwilliams are you 100% that this is correct (I haven't tested this myself). Should this be merged into the v1 branch?

[stephanwilliams]

Managed to find some docs on this, this documentation under Mark Dependencies and Resolve Dependencies seems to indicate that the path should be resolved (i.e. made absolute) by the loader in the case where it's adding the dependency directly and not transforming it into a require(...).

I've been developing with this change applied locally and haven't encountered any issues, and haven't had any further trouble with the webpack --watch problems I described in #211.

As far as I can tell webpack handles this the same between v1 and v2 so it seems this should be merged into both the v1 and master branches.