show/generate worker headers like hash keys
mention workers without options
more visible `false` to disable worker
options: inspect default value and wrap it into accents
options: put values in option descriptions in accents
Merge branch 'worker-options-in-readme'
don't try to register preprocessors when sprockets library is not initialised (app.assets is nil) closes #41
newlines in railtie
separate getting options in railtie
Merge branch 'no-sprockets-issue'