move target check outside of all format classes and operating on the final parsed JSON so that it works regardless of the input content type

for https://github.com/aaronpk/Aperture/issues/56

closes #92

replaces #78

including from rel=alternate

* mf2+html
* mf2+json
* feed+json
* xml
* instagram/facebook/github/xkcd

returns a new property `post-type` next to `type`

closes #25

closes #73

parse from both link tags and the u-redirect-uri property

main difference is the deprecated rel handling

closes #13

closes #51

if an item has multiple URL values, return the one that is on the same domain

checkin data is returned embedded like author data rather than in the `refs` object

closes #35

thanks to the new backcompat in php-mf2 0.3.2

* removes the HTTP classes from this project and uses p3k-http library instead
* reorganizes the XRay classes into a psr-4 compatible folder
* moves controller autoload into -dev in preparation for turning this into a library (#17)

skip image alt text for now

closes #34

closes #24

* closes #23
* major refactor of the methods for extracting properties to consolidate the logic
* hReview parsing is incomplete due to issues with the php-mf2 backcompat parsing. see https://github.com/indieweb/php-mf2/issues/107

closes #18

if the photo has a location, the timezone is set on the published date

If the input URL contains a fragment, finds the DOM tree at that ID and runs the subtree through the mf2 parser.

closes #15

errors fetching the URL should not result in a 400 response

closes #9