ecmascript/api-v1: Don't expose XML in the showtime object
ecmascript/api-v1: Expose config object in plugin object
Add support for 'data:' URI scheme

Fixes #2374
plugin: Improve error message when failing to load a plugin
ecmascript: Set 'loading' property during searches

Fixes #2361
ecmascript: Add Showtime.sleep() util method
ecmascript/page: Make sure 'loading' prop is always decreased (also on errors)
hls: Remove short circuit of hard-wired 404 retry counter
Merge branch 'showtime_sys_ip' of https://github.com/Cy-4AH/showtime into sysipaddr

Conflicts:
	resources/ecmascript/legacy/api-v1.js