EmailIt: Added GitHub Script and Theme Downloading

This latest version has the importing of Themes and Scripts from GitHub. It’s added to the preferences. The README.md file contains the information for uploading new themes and scripts to GitHub so that EmailIt can find them.

I had to remove the ScriptBar application from being bundled. The latest macOS update kills launching of it from EmailIt due to the fact I don’t want to pay the $100/year to get a developer certificate.

I’ve also trimmed down the size considerbly. Somehow I ended up with extra builds inside of a build. That’s now all fixed.