Use new Kodi18 getSettingInt()/Bool()/etc instead of getSetting()

[aqw]

https://alwinesch.github.io/group__python__xbmcaddon.html

Convenient, for stuff like:

bitrate_setting = int(addon.getSetting('preferred_bitrate'))

[aqw]

Much of resources/lib/kodiutils.py can be removed, as it''ll be redundant.

[jm-duke]

Doing some clean-up and this issue report is really old, so I'm closing it.