Fix JavaScriptInclude.detach.
Fix JavaScriptInclude.detach.

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