Big clean-up and update.
* A ton of source file names have changed.
* A few add-ons are gone from repo (Edit media, Preview.)
* A few new ones: Kanji tips, Play button, Spanify, Zoom.
Minor re-indent.
Show ankiweb id.
Changed images.
Style for the ankiweb id.
Update the add-on pages. Mostly the links to the source files. Also other ce.
Merge remote-tracking branch 'ospalh/defffelop' into defffelop

Conflicts:
	pages/Zoom.md