*.findOutgoingRelationsInParseTree: Always call the superclass' method.
Model HTTP redirects as relations. Closes #51.
Model <meta http-equiv="refresh" content="... url=..."> as a relation.
Added Asset.prototype.isRedirect getter.
Special case 301/302 redirects to the same url. Allow a new asset to be created with identical url instead of reusing the existing one.
http resolver: Don't update the url of the asset now that redirects aren't followed.
jshint
Merge pull request #209 from assetgraph/modelHttpRedirectsAsRelations

Model http redirects as relations