CMS-4618 Media Types - Introduce input type FileUploader

- moved imageupload/Image.ts -> upload/ImageUploader.ts
- renamed inputtype Image to ImageUploader
CMS-4618 Media Types - Introduce input type FileUploader

- updated FileUploader to show links to uploaded binaries
- created FileUploader.ts inputtype
- updated ImageUploader.ts inputtype to use ImageUploader
Merge pull request #1082 from enonic/cms-4618

CMS-4618 Media Types - Introduce input type FileUploader