Update unexpected to 3.2.0.
processImages: Fix reporting of non-GraphicsMagick errors.
Update jpegtran to 0.0.6.
buildProduction test: Fixed typos.
buildProduction, processImages: Test that images with wrong extensions are handled sort of gracefully.
Update pngcrush to 0.0.5.
Update optipng to 0.0.6.
buildProduction: Use the replaceSymbolsInJavaScript transform regardless of whether noCompress is set.