* ruffle:
- switch to ruffle 2023-05-13 release, later versions interfere with loading, it seems (see #180)
fixes#180
* add ruffle toggling options
- disable by default in embed mode, can be enabled with 'useruffle' attr
- enable by default in standalone, can be disabled with 'skipruffle' attr
- fixes#182
* update CHANGES for 1.8.1
ruffle: support for ruffle for flash loading, both hosted and in app
electron: update to latest beta (14) for latest chromium version
embed error messages: better error message when service worker can not be found
electron: build universal app for osx
bump to 1.5.0!
Ilya Kreymer