Added amazon.co.uk support and fixed some minor issues

[bernhardbauer]

• Added support for amazon.co.uk as neccessary in issue #19.
• Fixed the formatting to be consistent (mainly converted whitespaces to tabs as the file was mostly indented with tabs)
• Fixed an issue where the PiP button for amazon would be shown on ads and would not work → The PiP button will no longer be shown on ads, but immediately as soon as the video starts playing
• Commented out verbose output

@JoeKuhns I would kindly ask you to build a new .safariextension for the recently implemented features (as I don't have an apple developer certificate) so that we are all able to use this awesome extension.