Bliss Files

Changelog:

• Exposed xhr.abort() from $.fetch(), thanks to @kajmagnus
• Now possible to unset Bliss' default Content-type by passing undefined, thanks to @friday
• Polyfill for Element.remove() not needed anymore just to use $.include()
• $.inside(), $.before(), $.after(), $.start(), $.around() will not error anymore if the argument is empty.
• Dropped special handling for <template> in $.around()
• $.ready(callback) now possible, to allow synchronous execution if DOM is already loaded (even if Promise is resolved, .then() is not executed synchronously).