Release 1.6.0beta6.
Release 1.6.0beta6.

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