TBIO-5252: Refactored to remove "extends" from ExifReader to avoid polyfill
TBIO-5252: Refactored to remove "extends" from ExifReader to avoid polyfill

IBM minimiser breaks on the polyfill that is inserted to implement
extends so to work around it we are removing extends.
Also converted tabs to spaces so I recommend turning off whitespace
highlighting on the diff.

TeamupCom/tinymce,tinymce/tinymce,FernCreek/tinymce,FernCreek/tinymce,tinymce/tinymce,TeamupCom/tinymce,tinymce/tinymce,FernCreek/tinymce