* use string resources and dimens resources instead of hardcoded values
   >
* fix duplicate observers being added
   > every time the user changes the timeout or the dimming preference, all observers related to the app would be re-added, which added a lot of unnecessary slow downs
* updated README.md
   >

**Full Changelog**: https://github.com/abdalmoniem/Caffeinate/compare/v1.0...v1.1
