Add css class
Merge pull request #379 from cpoulain/master

Merge fixes for #317, #339, #365 from willum070
Add explicit content-type for css files coming from a bundle so that they are correctly interpreted by browsers.
Merge pull request #380 from cpoulain/master

Add explicit content-type for css files coming from a bundle...
Change default for missing data to demo better.
Merge pull request #381 from cpoulain/master

Change default for missing data to demo better.