Release 0.4.19.
Release 0.4.19.

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