* Add Recipe doc for implementing AMP on a site
* Fix typos
* Add section on using a different page template for AMP
* Move AMP recipe out of images
Not very image specific anymore
* Wording tweaks and grammar fixes
* Allow additional oembed providers to be used (currently all are hardcoded)
* Make per-provider configuration possible
* Choose which finders get used for which provider (eg, force use of oembed for instagram but use embedly for everything else)
* Allow specifying additional parameters for certian providers such as scheme=https to YouTube