Split AssetGraph.cloneAsset into two methods.
Split AssetGraph.cloneAsset into two methods.

jscinoz/assetgraph,jscinoz/assetgraph,assetgraph/assetgraph,papandreou/assetgraph,papandreou/assetgraph,jscinoz/assetgraph,papandreou/assetgraph,slang800/assetgraph,slang800/assetgraph