How to integrate External CSS Librairies in SAPUI5/UI5/Fiori

[corporateuser]

Similar to #802 we would like to externalize one of the css bundles, which is used in several Fiori applications. Currently css bundle has size of 200 KB, and used only in couple of applications, so bundling it together with several apps works. But in total we have more than 30 applications and what if we'll need to add it everywhere? Taking in account that maximum space available in html5-repo is 100 MB it could be depleted quite fast.

Any possibilities to do something like sap.ui.loader.config but for CSS files?