[#MmLRZ2E2] [#MmLRZ2E2] [#MmLRZ2E2] Make README less opinionated, add UMD definition

- Make the README less opinionated about how to use the module
- Add to README: DOM element, jQuery element or selector stings as ways to select the element.
- Add information about default template to README
- Add details about configuration options to README
- Add UMD definition to module

Branch: MmLRZ2E2-development

Branch: MmLRZ2E2-development

Branch: MmLRZ2E2-development