v5.4.0

Changed

• copy:assets task copies to config.assetDistDir instead of the pathBuilder.importedAssetsDistDir.
• css:bundle task loads the config.DistDir into postcss rather than importedAssetsDistDir
• The Readme copy:assets and config.importedAssets sections were updated.

Removed

• Removed config.importedAssets.importedAssetsDir .
• Removed pathBuilder.importedAssetsDistDir.
• Removed unit tests for above properties.
• Removed clean:assets task.
• The above properties and task were removed from the Readme.