Major changes to gallery and classes

Added prefixes to all tailwind and default gallery classes.

The prefix added is m24g-. Be sure to fit all style overrides with the new class name prefixes.

For example the .article-gallery class is now .m24g-article-gallery, the .flex class is now .m24g-flex, and so on.

This was added so the gallery would work alongside PurgeCSS, where you can now simply whitelist the pattern /^m24g-/.

Build release

Version bump

- Package build added
- Changed main file in package.json
- Color fallback for IE 11
- IE 11 enabled

First release of the gallery package

First release of the gallery package